[![Logo](https://www.paloaltonetworks.com/wp-content/uploads/2021/07/PANW_Parent.png)](https://www.paloaltonetworks.com/) [![Unit42 Logo](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/unit42-logo-white.svg)](https://unit42.paloaltonetworks.com/) Menu * [Tools](https://unit42.paloaltonetworks.com/tools/) * [ATOMs](https://unit42.paloaltonetworks.com/atoms/) * [Security Consulting](https://www.paloaltonetworks.com/unit42) * [About Us](https://unit42.paloaltonetworks.com/about-unit-42/) * [**Under Attack?**](https://start.paloaltonetworks.com/contact-unit42.html) English * [English](https://unit42.paloaltonetworks.com/microsoft-cve-2022-26925-etc/) * [Japanese](https://unit42.paloaltonetworks.com/ja/microsoft-cve-2022-26925-etc/) * [Threat Research Center](https://unit42.paloaltonetworks.com "Threat Research") * [High Profile Threats](https://unit42.paloaltonetworks.com/category/top-cyberthreats/ "High Profile Threats") * [Vulnerabilities](https://unit42.paloaltonetworks.com/category/vulnerabilities/ "Vulnerabilities") [Vulnerabilities](https://unit42.paloaltonetworks.com/category/vulnerabilities/) # Threat Brief: Microsoft Critical Vulnerabilities (CVE-2022-26809, CVE-2022-26923, CVE-2022-26925) ![Clock Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-clock.svg) 6 min read Related Products [![Advanced Threat Prevention icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/06/strata_RGB_logo_Icon_Color.png)Advanced Threat Prevention](https://unit42.paloaltonetworks.com/product-category/advanced-threat-prevention/ "Advanced Threat Prevention")[![Cortex XDR icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/06/cortex_RGB_logo_Icon_Color.png)Cortex XDR](https://unit42.paloaltonetworks.com/product-category/cortex-xdr/ "Cortex XDR")[![Next-Generation Firewall icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/06/strata_RGB_logo_Icon_Color.png)Next-Generation Firewall](https://unit42.paloaltonetworks.com/product-category/next-generation-firewall/ "Next-Generation Firewall") * ![Profile Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-profile-grey.svg) By: * [Chao Lei](https://unit42.paloaltonetworks.com/author/chao-lei/) * [Tao Yan](https://unit42.paloaltonetworks.com/author/tao-yan/) * [Haozhe Zhang](https://unit42.paloaltonetworks.com/author/haozhe-zhang/) * [Qi Deng](https://unit42.paloaltonetworks.com/author/qi-deng/) * ![Published Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-calendar-grey.svg) Published:July 27, 2022 * ![Tags Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-category.svg) Categories: * [High Profile Threats](https://unit42.paloaltonetworks.com/category/top-cyberthreats/) * [Vulnerabilities](https://unit42.paloaltonetworks.com/category/vulnerabilities/) * ![Tags Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-tags-grey.svg) Tags: * [CVE-2022-26809](https://unit42.paloaltonetworks.com/tag/cve-2022-26809/) * [CVE-2022-26923](https://unit42.paloaltonetworks.com/tag/cve-2022-26923/) * [CVE-2022-26925](https://unit42.paloaltonetworks.com/tag/cve-2022-26925/) * [Microsoft](https://unit42.paloaltonetworks.com/tag/microsoft/) * [Microsoft Windows](https://unit42.paloaltonetworks.com/tag/microsoft-windows/) * [![Download Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-download.svg)](https://unit42.paloaltonetworks.com/microsoft-cve-2022-26925-etc/?pdf=download&lg=en&_wpnonce=40dbae5d0f "Click here to download") * [![Print Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-print.svg)](https://unit42.paloaltonetworks.com/microsoft-cve-2022-26925-etc/?pdf=print&lg=en&_wpnonce=40dbae5d0f "Click here to print") Share![Down arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/down-arrow.svg) * ![Link Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-share-link.svg) * [![Link Email](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-sms.svg)]( "Share in email") * [![Facebook Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-fb-share.svg)](https://www.facebook.com/sharer/sharer.php?u=https%3A%2F%2Funit42.paloaltonetworks.com%2Fmicrosoft-cve-2022-26925-etc%2F "Share in Facebook") * [![LinkedIn Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-linkedin-share.svg)]( "Share in LinkedIn") * [![Twitter Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-twitter-share.svg)]( "Share in Twitter") * [![Reddit Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-reddit-share.svg)](https://www.paloaltonetworks.com//www.reddit.com/submit?url=https%3A%2F%2Funit42.paloaltonetworks.com%2Fmicrosoft-cve-2022-26925-etc%2F&ts=markdown "Share in Reddit") * [![Mastodon Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-mastodon-share.svg)]( "Share in Mastodon") ## Executive Summary Microsoft introduced patches for several critical vulnerabilities in their [April](https://msrc.microsoft.com/update-guide/releaseNote/2022-Apr) and [May](https://msrc.microsoft.com/update-guide/releaseNote/2022-May) 2022 security updates, including the following vulnerabilities: * [CVE-2022-26809](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-26809): An unauthorized attacker can exploit this vulnerability by sending a specially crafted Remote Procedure Call (RPC) to remotely execute arbitrary code on the vulnerable device. * [CVE-2022-26923](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-26923): A low-privileged user can escalate privilege to a domain administrator in a default Active Directory environment with the "Active Directory Certificate Services" server role installed. * [CVE-2022-26925](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-26925): Unauthenticated attackers can remotely exploit and force domain controllers to authenticate them via the Windows NT LAN Manager (NTLM) security protocol. We highly recommend that customers apply these security updates to address these issues. Palo Alto Networks customers receive protections from these vulnerabilities through the [Next-Generation Firewall](https://www.paloaltonetworks.com/network-security/next-generation-firewall) with a [Threat Prevention](https://www.paloaltonetworks.com/network-security/threat-prevention) subscription, [Cortex XDR](https://www.paloaltonetworks.com/cortex/cortex-xdr) and other products. |----------------|------------------------------------------------| | CVEs discussed | CVE-2022-26809, CVE-2022-26923, CVE-2022-26925 | ## Affected Versions ### CVE-2022-26809 The following versions of the Microsoft Windows OS are vulnerable to CVE-2022-26809: Windows 7 for 32-bit systems Service Pack 1 Windows 7 for x64-based systems Service Pack 1 Windows 8.1 for 32-bit systems Windows RT 8.1 Windows 8.1 for x64-based systems Windows 10 Version 20H2 for ARM64-based systems Windows 10 Version 1909 for ARM64-based systems Windows 10 Version 1809 for x64-based systems Windows 10 for 32-bit systems Windows 10 Version 21H2 for x64-based systems Windows 10 Version 21H2 for ARM64-based systems Windows 10 Version 21H2 for 32-bit systems Windows 10 Version 1809 for 32-bit systems Windows 10 Version 21H1 for 32-bit systems Windows 10 Version 21H1 for ARM64-based systems Windows 10 Version 21H1 for x64-based systems Windows 10 Version 20H2 for 32-bit systems Windows 10 Version 20H2 for x64-based systems Windows 10 Version 1607 for x64-based systems Windows 10 Version 1607 for 32-bit systems Windows 10 for x64-based systems Windows 10 Version 1909 for x64-based systems Windows 10 Version 1909 for 32-bit systems Windows 10 Version 1809 for ARM64-based systems Windows 11 for ARM64-based systems Windows 11 for x64-based systems Windows Server 2008 R2 for x64-based systems Service Pack 1 (Server Core installation) Windows Server 2008 R2 for x64-based systems Service Pack 1 Windows Server 2008 for x64-based systems Service Pack 2 (Server Core installation) Windows Server 2008 for x64-based systems Service Pack 2 Windows Server 2008 for 32-bit systems Service Pack 2 (Server Core installation) Windows Server 2008 for 32-bit systems Service Pack 2 Windows Server 2012 R2 (Server Core installation) Windows Server 2012 R2 Windows Server 2012 (Server Core installation) Windows Server 2012 Windows Server 2016 Windows Server 2016 (Server Core installation) Windows Server, version 20H2 (Server Core Installation) Windows Server 2019 (Server Core installation) Windows Server 2019 Windows Server 2022 (Server Core installation) Windows Server 2022 ### CVE-2022-26923 The following versions of the Microsoft Windows OS are vulnerable to CVE-2022-26923: Windows Server 2012 R2 (Server Core installation) Windows Server 2012 R2 Windows RT 8.1 Windows 8.1 for x64-based systems Windows 8.1 for 32-bit systems Windows Server 2016 (Server Core installation) Windows Server 2016 Windows 10 Version 1607 for x64-based systems Windows 10 Version 1607 for 32-bit systems Windows 10 for x64-based systems Windows 10 for 32-bit systems Windows 10 Version 21H2 for x64-based systems Windows 10 Version 21H2 for ARM64-based systems Windows 10 Version 21H2 for 32-bit systems Windows 11 for ARM64-based systems Windows 11 for x64-based systems Windows Server, version 20H2 (Server Core Installation) Windows 10 Version 20H2 for ARM64-based systems Windows 10 Version 20H2 for 32-bit systems Windows 10 Version 20H2 for x64-based systems Windows Server 2022 (Server Core installation) Windows Server 2022 Windows 10 Version 21H1 for 32-bit systems Windows 10 Version 21H1 for ARM64-based systems Windows 10 Version 21H1 for x64-based systems Windows 10 Version 1909 for ARM64-based systems Windows 10 Version 1909 for x64-based systems Windows 10 Version 1909 for 32-bit systems Windows Server 2019 (Server Core installation) Windows Server 2019 Windows 10 Version 1809 for ARM64-based systems Windows 10 Version 1809 for x64-based systems Windows 10 Version 1809 for 32-bit systems ### CVE-2022-26925 The following versions of the Microsoft Windows OS are vulnerable to CVE-2022-26925: Windows Server 2012 R2 (Server Core installation) Windows Server 2012 R2 Windows Server 2012 (Server Core installation) Windows Server 2012 Windows Server 2008 R2 for x64-based systems Service Pack 1 (Server Core installation) Windows Server 2008 R2 for x64-based systems Service Pack 1 Windows Server 2008 for x64-based systems Service Pack 2 (Server Core installation) Windows Server 2008 for x64-based systems Service Pack 2 Windows Server 2008 for 32-bit systems Service Pack 2 (Server Core installation) Windows Server 2008 for 32-bit systems Service Pack 2 Windows RT 8.1 Windows 8.1 for x64-based systems Windows 8.1 for 32-bit systems Windows 7 for x64-based systems Service Pack 1 Windows 7 for 32-bit systems Service Pack 1 Windows Server 2016 (Server Core installation) Windows Server 2016 Windows 10 Version 1607 for x64-based systems Windows 10 Version 1607 for 32-bit systems Windows 10 for x64-based systems Windows 10 for 32-bit systems Windows 10 Version 21H2 for x64-based systems Windows 10 Version 21H2 for ARM64-based systems Windows 10 Version 21H2 for 32-bit systems Windows 11 for ARM64-based systems Windows 11 for x64-based systems Windows Server, version 20H2 (Server Core Installation) Windows 10 Version 20H2 for ARM64-based systems Windows 10 Version 20H2 for 32-bit systems Windows 10 Version 20H2 for x64-based systems Windows Server 2022 (Server Core installation) Windows Server 2022 Windows 10 Version 21H1 for 32-bit systems Windows 10 Version 21H1 for ARM64-based systems Windows 10 Version 21H1 for x64-based systems Windows 10 Version 1909 for ARM64-based systems Windows 10 Version 1909 for x64-based systems Windows 10 Version 1909 for 32-bit systems Windows Server 2019 (Server Core installation) Windows Server 2019 Windows 10 Version 1809 for ARM64-based systems Windows 10 Version 1809 for x64-based systems Windows 10 Version 1809 for 32-bit systems ## Mitigations for CVE-2022-26809, CVE-2022-26923, CVE-2022-26925 Microsoft released patches for [CVE-2022-26809](https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2022-26809), [CVE-2022-26923](https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2022-26923) and [CVE-2022-26925](https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2022-26925). All three vulnerabilities and exploit details are publicly available, and CVE-2022-26925 was detected as being exploited in the wild. We strongly recommend patching them as soon as possible. ## Exploits ### CVE-2022-26809 -- RPC Remote Code Execution Vulnerability In Microsoft's April security update, there was a severe RPC vulnerability that could lead to remote code execution. This would provide an adversary with a remote attack surface, allowing them to attack the Windows SMB service remotely and execute code. This threat is not limited to Windows SMB service and may affect other services using the vulnerable RPC component. On May 1, 2022, we observed a public proof of concept (PoC) published on GitHub. The researcher conducted analysis of CVE-2022-26809 and created the PoC to trigger the vulnerable function OSF\_SCALL::GetCoalescedBuffer. The PoC is created based on an RPC sample code, Hello, from [Microsoft](https://github.com/microsoft/Windows-classic-samples/blob/main/Samples/Win7Samples/netds/rpc/hello). Since all interfaces for programs using RPC must be defined in Microsoft Interface Definition Language (MIDL) and compiled with the MIDL compiler, the researcher added a new pipe type and several functions in the IDL file. This is because the server side needs to use pipe in order to trigger the vulnerability. The related modifications are shown in Figure 1: ![Since all interfaces for programs using RPC must be defined in Microsoft Interface Definition Language (MIDL) and compiled with the MIDL compiler, the researcher added a new pipe type and several functions in the IDL file. This is because the server side needs to use pipe in order to trigger the vulnerability. The related modifications are shown here.](https://unit42.paloaltonetworks.com/wp-content/uploads/2022/07/word-image-112.png) Figure 1. IDL file modification. The PoC client utilizes impacket.dcerpc.v5.rpcrt to send the data. Additionally, the researcher modified the packet handling logic of the rpcrt library. Although the PoC only works on a customized RPC server and a successful exploitation of this vulnerability requires specific settings on the server side, it could be modified by an attacker to construct a feasible exploit for the default Windows service. We strongly recommend patching CVE-2022-26809 as soon as possible. ### CVE-2022-26923 -- Active Directory Domain Service Privilege Escalation Vulnerability This vulnerability allows a low-privileged user to escalate privileges to a domain administrator in a default Active Directory environment with the "Active Directory Certificate Services" server role installed. It is a logic issue that gets a valid certificate by using a fake domain controller, dNSHostName, and then gets the domain controller privileges by authenticating the certificate to the domain controller. Microsoft fixed CVE-2022-26923 in May's security update but the vulnerability and exploit details are publicly available. We strongly recommend patching it as soon as possible. ### CVE-2022-26925 -- Windows LSA Spoofing Vulnerability An unauthenticated attacker could call a method on the LSARPC interface and coerce the domain controller to authenticate the attacker using NTLM. Once the attacker gets the NTLM hash by the NTLM relay attack, the attacker can further use the leaked main controller NTLM hash to attack the system. CVE-2022-26925 was detected as being exploited in the wild and is publicly available. Microsoft fixed this vulnerability in May's security update. We strongly recommend patching it as soon as possible. ## Conclusion CVE-2022-26809 is still being actively monitored due to its potential to be exploited in widespread attacks. Given the information currently available, this vulnerability may have a high impact in the future. RPC is widely used by a wide variety of Windows and Windows Server versions. Besides that, the vulnerable rpcrt4.dll is not only used by Microsoft services but also by other applications. CVE-2022-26923 and CVE-2022-26925 exploits are publicly available, and it's only a matter of time until those vulnerabilities are abused by attackers. Users are encouraged to take all necessary steps to ensure they are protected against these vulnerabilities. The Palo Alto Networks Next-Generation Firewall with a Threat Prevention subscription can block the attack traffic related to these vulnerabilities. * CVE-2022-26809 Coverage: Threat ID 92490 (Application and Threat content update 8557) * CVE-2022-26923 Coverage: Threat ID 92548 (Application and Threat content update 8568) * CVE-2022-26925 Coverage: Threat ID 92549 (Application and Threat content update 8568) Palo Alto Networks Cortex customers are protected from CVE-2022-26923 and CVE-2022-26925. ## Additional Resources [Remote Procedure Call Runtime Remote Code Execution Vulnerability](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-26809) -- Microsoft [Active Directory Domain Services Elevation of Privilege Vulnerability](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-26923) -- Microsoft [Certifried: Active Directory Domain Privilege Escalation (CVE-2022--26923)](https://research.ifcr.dk/certifried-active-directory-domain-privilege-escalation-cve-2022-26923-9e098fe298f4) -- IFCR [PetitPotam](https://github.com/topotam/PetitPotam) -- GitHub [Microsoft fixes new PetitPotam Windows NTLM Relay attack vecto](https://www.bleepingcomputer.com/news/security/microsoft-fixes-new-petitpotam-windows-ntlm-relay-attack-vector/)r -- BleepingComputer [Windows LSA Spoofing Vulnerability](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-26925) -- Microsoft [Remote procedure call (RPC)](https://docs.microsoft.com/en-us/windows/win32/rpc/rpc-start-page) -- Microsoft Back to top ### Tags * [CVE-2022-26809](https://unit42.paloaltonetworks.com/tag/cve-2022-26809/ "CVE-2022-26809") * [CVE-2022-26923](https://unit42.paloaltonetworks.com/tag/cve-2022-26923/ "CVE-2022-26923") * [CVE-2022-26925](https://unit42.paloaltonetworks.com/tag/cve-2022-26925/ "CVE-2022-26925") * [Microsoft](https://unit42.paloaltonetworks.com/tag/microsoft/ "Microsoft") * [Microsoft Windows](https://unit42.paloaltonetworks.com/tag/microsoft-windows/ "Microsoft Windows") [Threat Research Center](https://unit42.paloaltonetworks.com "Threat Research") [Next: Attackers Move Quickly to Exploit High-Profile Zero Days: Insights From the 2022 Unit 42 Incident Response Report](https://unit42.paloaltonetworks.com/incident-response-report/ "Attackers Move Quickly to Exploit High-Profile Zero Days: Insights From the 2022 Unit 42 Incident Response Report") ### Table of Contents * ### Related Articles * [How We Added WebAuthn to a Browser-Based RDP Client](https://unit42.paloaltonetworks.com/webauthn-added-to-browser-based-rdp/ "article - table of contents") * [Inside AD CS Escalation: Unpacking Advanced Misuse Techniques and Tools](https://unit42.paloaltonetworks.com/active-directory-certificate-services-exploitation/ "article - table of contents") * [Microsoft WSUS Remote Code Execution (CVE-2025-59287) Actively Exploited in the Wild (Updated November 3)](https://unit42.paloaltonetworks.com/microsoft-cve-2025-59287/ "article - table of contents") ## Related Vulnerabilities Resources ![Pictorial representation of a group of people interacting with a dynamic 3D holographic display of colorful, undulating data waves on a table.](https://unit42.paloaltonetworks.com/wp-content/uploads/2025/09/11_Myth-Busting_Overview_1920x900-786x368.jpg) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2025/08/Insights-icon-white.svg)Insights](https://unit42.paloaltonetworks.com/category/insights/) August 4, 2026 [#### The Frontier AI Vulnerability Burst: Industrializing Autonomous Zero-Day Discovery in Open-Source Software](https://unit42.paloaltonetworks.com/frontier-ai-vulnerability-burst/) * [AI](https://unit42.paloaltonetworks.com/tag/ai/ "AI") * [Frontier AI](https://unit42.paloaltonetworks.com/tag/frontier-ai/ "Frontier AI") * [Vulnerability Exploitation](https://unit42.paloaltonetworks.com/tag/vulnerability-exploitation/ "Vulnerability Exploitation") [Read now ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/frontier-ai-vulnerability-burst/ "The Frontier AI Vulnerability Burst: Industrializing Autonomous Zero-Day Discovery in Open-Source Software") ![Pictorial representation of AI-enabled autonomous cyberattacks. A digital illustration depicting abstract, interconnected data streams in vibrant colors on a dark blue background](https://unit42.paloaltonetworks.com/wp-content/uploads/2026/07/AdobeStock_992950050-3-782x440.jpeg) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/06/icon-threat-research.svg)Threat Research](https://unit42.paloaltonetworks.com/category/threat-research/) July 30, 2026 [#### Chinese-Speaking Threat Actor Harnesses AI Models for Autonomous Cyberattacks](https://unit42.paloaltonetworks.com/autonomous-ai-cyber-attack-campaign/) * [ChatGPT](https://unit42.paloaltonetworks.com/tag/chatgpt/ "ChatGPT") * [Claude code](https://unit42.paloaltonetworks.com/tag/claude-code/ "Claude code") * [CVEs](https://unit42.paloaltonetworks.com/tag/cves/ "CVEs") [Read now ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/autonomous-ai-cyber-attack-campaign/ "Chinese-Speaking Threat Actor Harnesses AI Models for Autonomous Cyberattacks") ![Pictorial representation of three zero-day vulnerabilities in Siemens ROX II OT switches. Digital illustration of a global network featuring interconnected lines and nodes over a map of the world, highlighted with neon lights and digital elements.](https://unit42.paloaltonetworks.com/wp-content/uploads/2026/07/03_Vulnerabilities_1920x900-786x368.jpg) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/06/icon-threat-research.svg)Threat Research](https://unit42.paloaltonetworks.com/category/threat-research/) July 17, 2026 [#### Three Steps to the Terminal: A Siemens ROX II Zero-Day Trilogy](https://unit42.paloaltonetworks.com/siemens-rox-ii-zero-day-vulnerabilities/) * [Command injection](https://unit42.paloaltonetworks.com/tag/command-injection/ "Command injection") * [CVE-2025-40947](https://unit42.paloaltonetworks.com/tag/cve-2025-40947/ "CVE-2025-40947") * [CVE-2025-40948](https://unit42.paloaltonetworks.com/tag/cve-2025-40948/ "CVE-2025-40948") [Read now ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/siemens-rox-ii-zero-day-vulnerabilities/ "Three Steps to the Terminal: A Siemens ROX II Zero-Day Trilogy") ![Pictorial representation of PAN-OS CVE-2026-0257. A vibrant city skyline at night, with tall skyscrapers and glowing digital beams extending into the sky, suggesting advanced technology and connectivity.](https://unit42.paloaltonetworks.com/wp-content/uploads/2026/06/07_Vulnerabilities_1920x900-786x368.jpg) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/07/top-threats.svg)High Profile Threats](https://unit42.paloaltonetworks.com/category/top-cyberthreats/) June 9, 2026 [#### Threat Brief: Active Exploitation of PAN-OS CVE-2026-0257](https://unit42.paloaltonetworks.com/active-exploitation-of-pan-os-cve-2026-0257/) * [CVE-2026-0257](https://unit42.paloaltonetworks.com/tag/cve-2026-0257/ "CVE-2026-0257") * [Vulnerability](https://unit42.paloaltonetworks.com/tag/vulnerability/ "vulnerability") [Read now ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/active-exploitation-of-pan-os-cve-2026-0257/ "Threat Brief: Active Exploitation of PAN-OS CVE-2026-0257") ![Pictorial representation of CVE-2026-30300. Digital illustration of a map of North America with interconnected glowing lines and dots symbolizing network connections across the continent.](https://unit42.paloaltonetworks.com/wp-content/uploads/2026/05/06_Vulnerabilities_1920x900-3-1-786x368.jpg) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/07/top-threats.svg)High Profile Threats](https://unit42.paloaltonetworks.com/category/top-cyberthreats/) May 6, 2026 [#### Threat Brief: Exploitation of PAN-OS Captive Portal Zero-Day for Unauthenticated Remote Code Execution](https://unit42.paloaltonetworks.com/captive-portal-zero-day/) * [CVE-2026-0300](https://unit42.paloaltonetworks.com/tag/cve-2026-0300/ "CVE-2026-0300") * [EarthWorm](https://unit42.paloaltonetworks.com/tag/earthworm/ "EarthWorm") * [PAN-OS](https://unit42.paloaltonetworks.com/tag/pan-os/ "PAN-OS") [Read now ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/captive-portal-zero-day/ "Threat Brief: Exploitation of PAN-OS Captive Portal Zero-Day for Unauthenticated Remote Code Execution") ![Pictorial representation of a severe Linux vulnerability. Close-up of a woman wearing glasses and focusing intently on a computer screen.](https://unit42.paloaltonetworks.com/wp-content/uploads/2026/05/05_Vulnerabilities_1920x900-2-1-786x368.jpg) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/07/top-threats.svg)High Profile Threats](https://unit42.paloaltonetworks.com/category/top-cyberthreats/) May 5, 2026 [#### Copy Fail: What You Need to Know About the Most Severe Linux Threat in Years](https://unit42.paloaltonetworks.com/cve-2026-31431-copy-fail/) * [Containers](https://unit42.paloaltonetworks.com/tag/containers/ "Containers") * [CVE-2026-31431](https://unit42.paloaltonetworks.com/tag/cve-2026-31431/ "CVE-2026-31431") * [Kubernetes](https://unit42.paloaltonetworks.com/tag/kubernetes/ "Kubernetes") [Read now ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/cve-2026-31431-copy-fail/ "Copy Fail: What You Need to Know About the Most Severe Linux Threat in Years") ![Pictorial representation of CVE-2023-33538. Abstract image of a glowing red Wi-Fi symbol on a circuit board, with intricate patterns and a futuristic appearance.](https://unit42.paloaltonetworks.com/wp-content/uploads/2026/04/04_Vulnerabilities_1920x900-786x368.jpg) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/06/icon-threat-research.svg)Threat Research](https://unit42.paloaltonetworks.com/category/threat-research/) April 16, 2026 [#### A Deep Dive Into Attempted Exploitation of CVE-2023-33538](https://unit42.paloaltonetworks.com/exploitation-of-cve-2023-33538/) * [Botnet](https://unit42.paloaltonetworks.com/tag/botnet/ "botnet") * [Command injection](https://unit42.paloaltonetworks.com/tag/command-injection/ "Command injection") * [CVE-2023-33538](https://unit42.paloaltonetworks.com/tag/cve-2023-33538/ "CVE-2023-33538") [Read now ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/exploitation-of-cve-2023-33538/ "A Deep Dive Into Attempted Exploitation of CVE-2023-33538") ![Pictorial representation of BeyondTrust vulnerability CVE-2026-1731. Digital art depicting a stylized mountain range with vibrant blue and red hues. The peaks are accentuated by glowing particles and an abstract, starry backdrop, creating a futuristic landscape.](https://unit42.paloaltonetworks.com/wp-content/uploads/2026/02/14_Overview_1920x900-786x368.jpg) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/07/top-threats.svg)High Profile Threats](https://unit42.paloaltonetworks.com/category/top-cyberthreats/) February 19, 2026 [#### VShell and SparkRAT Observed in Exploitation of BeyondTrust Critical Vulnerability (CVE-2026-1731)](https://unit42.paloaltonetworks.com/beyondtrust-cve-2026-1731/) * [Bash](https://unit42.paloaltonetworks.com/tag/bash/ "bash") * [CVE-2026-1731](https://unit42.paloaltonetworks.com/tag/cve-2026-1731/ "CVE-2026-1731") * [PowerShell](https://unit42.paloaltonetworks.com/tag/powershell/ "PowerShell") [Read now ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/beyondtrust-cve-2026-1731/ "VShell and SparkRAT Observed in Exploitation of BeyondTrust Critical Vulnerability (CVE-2026-1731)") ![](https://unit42.paloaltonetworks.com/wp-content/uploads/2026/02/AdobeStock_1020436911-786x440.jpeg) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/07/top-threats.svg)High Profile Threats](https://unit42.paloaltonetworks.com/category/top-cyberthreats/) February 17, 2026 [#### Critical Vulnerabilities in Ivanti EPMM Exploited](https://unit42.paloaltonetworks.com/ivanti-cve-2026-1281-cve-2026-1340/) * [CVE-2026-1281](https://unit42.paloaltonetworks.com/tag/cve-2026-1281/ "CVE-2026-1281") * [CVE-2026-1340](https://unit42.paloaltonetworks.com/tag/cve-2026-1340/ "CVE-2026-1340") * [Ivanti](https://unit42.paloaltonetworks.com/tag/ivanti/ "Ivanti") [Read now ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/ivanti-cve-2026-1281-cve-2026-1340/ "Critical Vulnerabilities in Ivanti EPMM Exploited") ![Pictorial representation of CVE-2025-0921. Digital illustration of a map of North America with interconnected glowing lines and dots symbolizing network connections across the continent.](https://unit42.paloaltonetworks.com/wp-content/uploads/2026/01/06_Vulnerabilities_1920x900-2-1-786x368.jpg) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/06/icon-threat-research.svg)Threat Research](https://unit42.paloaltonetworks.com/category/threat-research/) January 30, 2026 [#### Privileged File System Vulnerability Present in a SCADA System](https://unit42.paloaltonetworks.com/iconics-suite-cve-2025-0921/) * [CVE-2025-0921](https://unit42.paloaltonetworks.com/tag/cve-2025-0921/ "CVE-2025-0921") * [Privilege escalation](https://unit42.paloaltonetworks.com/tag/privilege-escalation/ "privilege escalation") * [SCADA](https://unit42.paloaltonetworks.com/tag/scada/ "SCADA") [Read now ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/iconics-suite-cve-2025-0921/ "Privileged File System Vulnerability Present in a SCADA System") * ![Slider arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/slider-arrow-left.svg) * ![Slider arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/slider-arrow-left.svg) ![Close button](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/close-modal.svg) ![Enlarged Image]() ![Newsletter](https://unit42.paloaltonetworks.com/wp-content/uploads/2026/03/unit42-footer-subscribe-desktop.png) ![UNIT 42 Small Logo](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/palo-alto-logo-small.svg) Get updates from Unit 42 ## Peace of mind comes from staying ahead of threats. Subscribe today. Your Email Subscribe for email updates to all Unit 42 threat research. By submitting this form, you agree to our [Terms of Use](https://www.paloaltonetworks.com/legal-notices/terms-of-use "Terms of Use") and acknowledge our [Privacy Statement.](https://www.paloaltonetworks.com/legal-notices/privacy "Privacy Statement") This site is protected by reCAPTCHA and the Google [Privacy Policy](https://policies.google.com/privacy) and [Terms of Service](https://policies.google.com/terms) apply. Invalid captcha! Subscribe ![Right Arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/right-arrow.svg) ![loader](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-loader.svg) {#footer} Products and Services * [AI-Powered Network Security Platform](https://www.paloaltonetworks.com/network-security) * [Secure AI by Design](https://www.paloaltonetworks.com/ai-security) * [Prisma AIRS](https://www.paloaltonetworks.com/ai-security/prisma-airs) * [AI Access Security](https://www.paloaltonetworks.com/sase/ai-access-security) * [Cloud Delivered Security Services](https://www.paloaltonetworks.com/network-security/security-subscriptions) * [Advanced Threat Prevention](https://www.paloaltonetworks.com/network-security/advanced-threat-prevention) * [Advanced URL Filtering](https://www.paloaltonetworks.com/network-security/advanced-url-filtering) * [Advanced WildFire](https://www.paloaltonetworks.com/network-security/advanced-wildfire) * [Advanced DNS Security](https://www.paloaltonetworks.com/network-security/advanced-dns-security) * [Enterprise Data Loss Prevention](https://www.paloaltonetworks.com/sase/enterprise-data-loss-prevention) * [Enterprise IoT Security](https://www.paloaltonetworks.com/network-security/enterprise-device-security) * [Medical IoT Security](https://www.paloaltonetworks.com/network-security/medical-device-security) * [Industrial OT Security](https://www.paloaltonetworks.com/network-security/ot-security-solution) * [SaaS Security](https://www.paloaltonetworks.com/sase/saas-security) * [Next-Generation Firewalls](https://www.paloaltonetworks.com/network-security/next-generation-firewall) * [Hardware Firewalls](https://www.paloaltonetworks.com/network-security/hardware-firewall-innovations) * [Software Firewalls](https://www.paloaltonetworks.com/network-security/software-firewalls) * [Strata Cloud Manager](https://www.paloaltonetworks.com/network-security/strata-cloud-manager) * [SD-WAN for NGFW](https://www.paloaltonetworks.com/network-security/sd-wan-subscription) * [PAN-OS](https://www.paloaltonetworks.com/network-security/pan-os) * [Panorama](https://www.paloaltonetworks.com/network-security/panorama) * [Secure Access Service Edge](https://www.paloaltonetworks.com/sase) * [Prisma SASE](https://www.paloaltonetworks.com/sase) * [Application Acceleration](https://www.paloaltonetworks.com/sase/app-acceleration) * [Autonomous Digital Experience Management](https://www.paloaltonetworks.com/sase/adem) * [Enterprise DLP](https://www.paloaltonetworks.com/sase/enterprise-data-loss-prevention) * [Prisma Access](https://www.paloaltonetworks.com/sase/access) * [Prisma Browser](https://www.paloaltonetworks.com/sase/prisma-browser) * [Prisma SD-WAN](https://www.paloaltonetworks.com/sase/sd-wan) * [Remote Browser Isolation](https://www.paloaltonetworks.com/sase/remote-browser-isolation) * [SaaS Security](https://www.paloaltonetworks.com/sase/saas-security) * [AI-Driven Security Operations Platform](https://www.paloaltonetworks.com/cortex) * [Cloud Security](https://www.paloaltonetworks.com/cortex/cloud) * [Cortex Cloud](https://www.paloaltonetworks.com/cortex/cloud) * [Application Security](https://www.paloaltonetworks.com/cortex/cloud/application-security) * [Cloud Posture Security](https://www.paloaltonetworks.com/cortex/cloud/cloud-posture-security) * [Cloud Runtime Security](https://www.paloaltonetworks.com/cortex/cloud/runtime-security) * [Prisma Cloud](https://www.paloaltonetworks.com/prisma/cloud) * [AI-Driven SOC](https://www.paloaltonetworks.com/cortex) * [Cortex XSIAM](https://www.paloaltonetworks.com/cortex/cortex-xsiam) * [Cortex XDR](https://www.paloaltonetworks.com/cortex/cortex-xdr) * [Cortex XSOAR](https://www.paloaltonetworks.com/cortex/cortex-xsoar) * [Cortex Xpanse](https://www.paloaltonetworks.com/cortex/cortex-xpanse) * [Unit 42 Managed Detection \& Response](https://www.paloaltonetworks.com/cortex/managed-detection-and-response) * [Managed XSIAM](https://www.paloaltonetworks.com/cortex/managed-xsiam) * [Next-Generation Identity Security](https://www.paloaltonetworks.com/idira) * [Privileged Access Management](https://www.paloaltonetworks.com/idira/human/privileged-access-management) * [Identity and Access Management](https://www.paloaltonetworks.com/idira/human/identity-and-access-management) * [Endpoint Privilege Manager](https://www.paloaltonetworks.com/idira/human/endpoint-privilege-manager) * [Identity Governance](https://www.paloaltonetworks.com/idira/human/identity-governance) * [Workforce Password Management](https://www.paloaltonetworks.com/idira/human/workforce-password-management) * [Agentic Identities](https://www.paloaltonetworks.com/idira/agentic) * [Secrets Management](https://www.paloaltonetworks.com/idira/machine/secrets-management) * [Unified Secrets Governance](https://www.paloaltonetworks.com/idira/machine/unified-secrets-governance) * [Application Credentials Delivery](https://www.paloaltonetworks.com/idira/machine/application-credentials-delivery) * [Vendor Privileged Access](https://www.paloaltonetworks.com/idira/human/vendor-privileged-access) * [Threat Intel and Incident Response Services](https://www.paloaltonetworks.com/unit42) * [Prepare for Emerging Risks](https://www.paloaltonetworks.com/unit42/frontier-ai-defense) * [Strengthen Your Defenses](https://www.paloaltonetworks.com/unit42/strengthen-your-defenses) * [Build Your Security Strategy](https://www.paloaltonetworks.com/unit42/build-your-security-strategy) * [Understand the Adversary](https://www.paloaltonetworks.com/unit42/threat-intelligence) * [Respond to a Cyber Attack](https://www.paloaltonetworks.com/unit42/respond) Company * [About Us](https://www.paloaltonetworks.com/about-us) * [Careers](https://jobs.paloaltonetworks.com/en/) * [Contact Us](https://www.paloaltonetworks.com/company/contact-sales) * [Corporate Responsibility](https://www.paloaltonetworks.com/about-us/corporate-responsibility) * [Customers](https://www.paloaltonetworks.com/customers) * [Investor Relations](https://investors.paloaltonetworks.com/) * [Location](https://www.paloaltonetworks.com/about-us/locations) * [Newsroom](https://www.paloaltonetworks.com/company/newsroom) Popular Links * [Blog](https://www.paloaltonetworks.com/blog/) * [Communities](https://www.paloaltonetworks.com/communities) * [Content Library](https://www.paloaltonetworks.com/resources) * [Cyberpedia](https://www.paloaltonetworks.com/cyberpedia) * [Event Center](https://events.paloaltonetworks.com/) * [Manage Email Preferences](https://start.paloaltonetworks.com/preference-center) * [Products A-Z](https://www.paloaltonetworks.com/products/products-a-z) * [Product Certifications](https://www.paloaltonetworks.com/legal-notices/trust-center/certifications) * [Report a Vulnerability](https://www.paloaltonetworks.com/security-disclosure) * [Sitemap](https://www.paloaltonetworks.com/sitemap) * [Tech Docs](https://docs.paloaltonetworks.com/) * [Unit 42](https://unit42.paloaltonetworks.com/) * [Do Not Sell or Share My Personal Information](https://panwedd.exterro.net/portal/dsar.htm?target=panwedd) ![Palo Alto Networks Logo](https://www.paloaltonetworks.com/etc/clientlibs/clean/imgs/pan-logo-dark.svg) * [Privacy](https://www.paloaltonetworks.com/legal-notices/privacy) * [Trust Center](https://www.paloaltonetworks.com/legal-notices/trust-center) * [Terms of Use](https://www.paloaltonetworks.com/legal-notices/terms-of-use) * [Documents](https://www.paloaltonetworks.com/legal) Copyright © 2026 Palo Alto Networks. All Rights Reserved * [![Youtube](https://www.paloaltonetworks.com/etc/clientlibs/clean/imgs/social/youtube-black.svg)](https://www.youtube.com/user/paloaltonetworks) * [![Podcast](https://www.paloaltonetworks.com/content/dam/pan/en_US/images/icons/podcast.svg)](https://www.paloaltonetworks.com/podcasts/threat-vector) * [![Facebook](https://www.paloaltonetworks.com/etc/clientlibs/clean/imgs/social/facebook-black.svg)](https://www.facebook.com/PaloAltoNetworks/) * [![LinkedIn](https://www.paloaltonetworks.com/etc/clientlibs/clean/imgs/social/linkedin-black.svg)](https://www.linkedin.com/company/palo-alto-networks) * [![Twitter](https://www.paloaltonetworks.com/etc/clientlibs/clean/imgs/social/twitter-x-black.svg)](https://twitter.com/PaloAltoNtwks) * EN Select your language ![Play](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/player-play-icon.svg) ![Pause](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/player-pause-icon1.svg) ![Minimize](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-minimize.svg) ![Close button](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/close-modal.svg) ### Default Heading Read the article ![Right Arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/right-arrow.svg) Seekbar ![Play](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/player-play-icon.svg) ![Pause](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/player-pause-icon1.svg) ![Volume](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-volume.svg) Volume ![Minimize](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-minimize.svg)