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[Vulnerabilities](https://unit42.paloaltonetworks.com/category/vulnerabilities/ "Vulnerabilities") [Vulnerabilities](https://unit42.paloaltonetworks.com/category/vulnerabilities/) # Threat Brief: RCE Vulnerability CVE-2023-3519 on Customer-Managed Citrix Servers ![Clock Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-clock.svg) 5 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 Xpanse icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/06/cortex_RGB_logo_Icon_Color.png)Cortex Xpanse](https://unit42.paloaltonetworks.com/product-category/cortex-xpanse/ "Cortex Xpanse")[![Cortex XSOAR 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Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-calendar-grey.svg) Published:July 28, 2023 * ![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/) * [Threat Research](https://unit42.paloaltonetworks.com/category/threat-research/) * [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: * [Citrix](https://unit42.paloaltonetworks.com/tag/citrix/) * [Citrix Netscaler](https://unit42.paloaltonetworks.com/tag/citrix-netscaler/) * [CVE-2023-3466](https://unit42.paloaltonetworks.com/tag/cve-2023-3466/) * [CVE-2023-3467](https://unit42.paloaltonetworks.com/tag/cve-2023-3467/) * [CVE-2023-3519](https://unit42.paloaltonetworks.com/tag/cve-2023-3519/) * [![Download Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-download.svg)](https://unit42.paloaltonetworks.com/threat-brief-citrix-cve-2023-3519/?pdf=download&lg=en&_wpnonce=48697d1bdd "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/threat-brief-citrix-cve-2023-3519/?pdf=print&lg=en&_wpnonce=48697d1bdd "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 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When these appliances are configured as a gateway or authentication server and managed by a customer (i.e., not Citrix-managed) they can be vulnerable to remote code execution initiated by an attacker. Vulnerabilities on Citrix-managed servers have already been mitigated. Citrix states that they have observed attacks targeting [CVE-2023-3519](https://support.citrix.com/article/CTX561482/citrix-adc-and-citrix-gateway-security-bulletin-for-cve20233519-cve20233466-cve20233467) against appliances that haven't been patched. The Cybersecurity and Infrastructure Security Agency (CISA) has also [released an advisory](https://www.cisa.gov/news-events/cybersecurity-advisories/aa23-201a) detailing an attack using this vulnerability. Palo Alto Networks customers receive protections from and mitigations for CVE-2023-3519 in the following ways: * [Next-Generation Firewall](https://docs.paloaltonetworks.com/ngfw) with the [Advanced Threat Prevention](https://docs.paloaltonetworks.com/advanced-threat-prevention/administration) security subscription can help block the attacks. * [Cortex Xpanse](https://www.paloaltonetworks.com/cortex/cortex-xpanse) customers can identify external-facing instances of the application through the "**Insecure Citrix Application Delivery Controller"** attack surface rule. Palo Alto Networks also recommends patching against these vulnerabilities, including CVE-2023-3519, with the software update provided by Citrix. | **Vulnerabilities Discussed** | [**CVE-2023-3519**](https://unit42.paloaltonetworks.com/tag/cve-2023-3519/), **[CVE-2023-3466](https://unit42.paloaltonetworks.com/tag/cve-2023-3466/), [CVE-2023-3467](https://unit42.paloaltonetworks.com/tag/cve-2023-3467)** | |-------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| ## Details of the Vulnerabilities CVE-2023-3519 is a remote code execution (RCE) vulnerability with a CVSS severity score of 9.8 that was disclosed on July 18, 2023. This vulnerability affects older installations of NetScaler ADC (an application delivery controller firmware for securing network traffic) as well as NetScaler Gateway, which is an access gateway that provides VPN and single sign-on (SSO) capabilities for remote end users of network assets. Additional vulnerabilities covered in this security bulletin affecting NetScaler users include [CVE-2023-3466](https://cve.mitre.org/cgi-bin/cvename.cgi?name=2023-3466) and [CVE-2023-3467](https://cve.mitre.org/cgi-bin/cvename.cgi?name=2023-3467). According to Citrix, CVE-2023-3466 is a reflected Cross-Site Scripting (XSS) vulnerability that requires a victim to visit an attacker-controlled link via web browser while the virtual NetScaler appliance is on the same network with connectivity to the NetScaler IP (NSIP). CVE 2023-3467 is a privilege escalation vulnerability that requires attackers to have unauthenticated access to the NSIP or subnet IP (SNIP) with management interface access, and allows for potential privilege elevation to root administrator access. CVE-2023-3466 and CVE-2023-3467 have severity scores of 8.3 and 8 respectively. [According to Citrix](https://support.citrix.com/article/CTX561482/citrix-adc-and-citrix-gateway-security-bulletin-for-cve20233519-cve20233466-cve20233467), these three vulnerabilities affect the following versions of Citrix NetScaler ADC and NetScaler Gateway: * NetScaler ADC and NetScaler Gateway 13.1 before 13.1-49.13 * NetScaler ADC and NetScaler Gateway 13.0 before 13.0-91.13 * NetScaler ADC and NetScaler Gateway version 12.1 (EOL) * NetScaler ADC 13.1-FIPS before 13.1-37.159 * NetScaler ADC 12.1-FIPS before 12.1-55.297 * NetScaler ADC 12.1-NDcPP before 12.1-55.297 [CISA also reports](https://www.cisa.gov/news-events/cybersecurity-advisories/aa23-201a) that the appliance requires configuration as a gateway or authentication, authorization and auditing (AAA) server for exploitation. These updates from Citrix patch for all three of the aforementioned vulnerabilities. ## Current Scope of the Attack [CISA has reported](https://www.cisa.gov/news-events/cybersecurity-advisories/aa23-201a) at least one attack in which a threat actor had exploited this vulnerability as a zero-day exploit, to gain access to a critical infrastructure organization's NetScaler appliance. For this incident, the threat actor leveraged CVE-2023-3519 to drop a PHP webshell on the targeted appliance. The threat actor then used the dropped web shell to enumerate and exfiltrate Active Directory data. The threat actor also attempted further discovery activities but failed because the exploited NetScaler appliance was in a segmented environment. ## Interim Guidance Citrix has [released a patch](https://support.citrix.com/article/CTX561482/citrix-adc-and-citrix-gateway-security-bulletin-for-cve20233519-cve20233466-cve20233467) for this vulnerability and recommends that all customer managed appliances update as soon as possible. Additionally, [CISA released an advisory article](https://www.cisa.gov/news-events/cybersecurity-advisories/aa23-201a) with an accompanying [document containing information](https://www.cisa.gov/sites/default/files/2023-07/aa23-201a_csa_threat_actors_exploiting_citrix-cve-2023-3519_to_implant_webshells.pdf) on **detection methods, incident response tips, mitigations, and validating security controls** for securing your organization against this vulnerability and others like it. The CISA detection methods include information such as the following: * Instructions for modifying specific parameters regarding your NetScaler appliance installation * Specific commands for checking logs that may contain abnormalities * Guidance on reviewing various network logs that could indicate anomalous Application Delivery Controller (ADC) activity Their incident response guidance depicts basic steps to quarantine and reimage affected hosts, while provisioning account credentials and reviewing system and network artifacts such as processes, services, and logs. In terms of mitigations, [CISA provides the following recommendations](https://www.cisa.gov/news-events/cybersecurity-advisories/aa23-201a) for organizations: * Install the relevant updated version of NetScaler ADC and NetScaler Gateway as soon as possible. * Follow cybersecurity best practices in your production and enterprise environments, including mandating [phishing-resistant multifactor authentication (MFA)](https://www.cisa.gov/sites/default/files/publications/fact-sheet-implementing-phishing-resistant-mfa-508c.pdf) for all staff and for all services. Additional best practices can be found by referring to [CISA's Cross-Sector Cybersecurity Performance Goals](https://www.cisa.gov/cross-sector-cybersecurity-performance-goals). ## Conclusion Based on the amount of publicly available information, Palo Alto Networks highly recommends following CISA's guidance on mitigations for protecting your organization against CVE-2023-3519, CVE-2023-3466 and CVE-2023-3467. These mitigations include applying vendor-provided patches as well as executing their described detection and mitigation methods in your network environment. Palo Alto Networks and Unit 42 will continue to monitor the situation for updated information including release of proof-of-concept code or evidence of more widespread exploitation. Palo Alto Networks customers are protected by our products, as listed below. We will update this threat brief as more relevant information becomes available. ## Palo Alto Networks Product Protections for CVE-2023-3519 Palo Alto Networks customers can leverage a variety of product protections and updates to identify and defend against this threat. If you think you may have been compromised or have an urgent matter, get in touch with the [Unit 42 Incident Response team](https://start.paloaltonetworks.com/contact-unit42.html) or call: * North America Toll-Free: 866.486.4842 (866.4.UNIT42) * EMEA: +31.20.299.3130 * APAC: +65.6983.8730 * Japan: +81.50.1790.0200 ### Next-Generation Firewalls and Prisma Access With Advanced Threat Prevention [Next-Generation Firewall](https://docs.paloaltonetworks.com/ngfw) with the [Advanced Threat Prevention](https://docs.paloaltonetworks.com/advanced-threat-prevention/administration) security subscription can help block the attacks via the following Threat Prevention signature: [94145](https://threatvault.paloaltonetworks.com/?query=94145). ### Cortex Xpanse [Cortex Xpanse](https://www.paloaltonetworks.com/cortex/cortex-xpanse) customers can identify external facing instances of the application through the "**Insecure Citrix Application Delivery Controller"** attack surface rule. The rule is available to all customers with a default state of "On." ![Image 1 is a screenshot of the Cortex Xpanse interface. On the left is a menu. The policies and rules tab has been selected, and from that menu attack surface rules has been selected. The attack surface rules include a table that lists status, build ID, severity, a description, the rule name, and when it was modified. This all lists the information for CVE-2023-3519 affecting Citrix.](https://unit42.paloaltonetworks.com/wp-content/uploads/2023/07/word-image-129481-1.png) Figure 1. A screenshot of the Cortex Xpanse interface, showing the Insecure Citrix Application Delivery Controller rule enabled. Within Cortex Xpanse's Threat Response Center, organizations can also find curated threat intel summaries, exploit consequences, previous exploit activity, and links to other sources for additional information. This allows you to see how risk is distributed across your organization and build a remediation plan based on the guidance provided. Cortex Xpanse identifies service owners automatically, so organizations can easily assign a ticket to the right person. ![Image 2 is a screenshot of the Cortex Xpanse interface that lists the threat summary for CVE-2023-3519, including remediation and mediation, suggestions, and the exploit consequences. It also has a table of related CVEs.](https://unit42.paloaltonetworks.com/wp-content/uploads/2023/07/word-image-129481-2.png) Figure 2. A screenshot of the Cortex Xpanse interface, showing the Threat Summary, including Remediation and Mitigation Suggestions. ## Indicators of Compromise ### **SHA-256 Hash** * 293fe23849cffb460e8d28691c640a5292fd4649b0f94a019b45cc586be83fd9 ### **IP Addresses** * 216\.41.162\[.\]172 * 216\.51.171\[.\]17 ## **References** * [New Critical Citrix ADC and Gateway Flaw Exploited as Zero-Day](https://www.bleepingcomputer.com/news/security/new-critical-citrix-adc-and-gateway-flaw-exploited-as-zero-day/) -- Bleeping Computer * [Citrix ADC and Citrix Gateway Security Bulletin for CVE-2023-3519, CVE-2023-3466, CVE-2023-3467](https://support.citrix.com/article/CTX561482/citrix-adc-and-citrix-gateway-security-bulletin-for-cve20233519-cve20233466-cve20233467) -- Citrix Support Knowledge Center * [Threat Actors Exploiting Citrix CVE-2023-3519 to Implant Webshells](https://www.cisa.gov/news-events/cybersecurity-advisories/aa23-201a) -- CISA * [Threat Actors Exploiting Citrix CVE-2023-3519 to Implant Webshells](https://www.cisa.gov/sites/default/files/2023-07/aa23-201a_csa_threat_actors_exploiting_citrix-cve-2023-3519_to_implant_webshells.pdf) -- CISA (PDF) Back to top ### Tags * [Citrix](https://unit42.paloaltonetworks.com/tag/citrix/ "Citrix") * [Citrix Netscaler](https://unit42.paloaltonetworks.com/tag/citrix-netscaler/ "Citrix Netscaler") * [CVE-2023-3466](https://unit42.paloaltonetworks.com/tag/cve-2023-3466/ "CVE-2023-3466") * [CVE-2023-3467](https://unit42.paloaltonetworks.com/tag/cve-2023-3467/ "CVE-2023-3467") * [CVE-2023-3519](https://unit42.paloaltonetworks.com/tag/cve-2023-3519/ "CVE-2023-3519") [Threat Research Center](https://unit42.paloaltonetworks.com "Threat Research") [Next: Ransomware Delivery URLs: Top Campaigns and Trends](https://unit42.paloaltonetworks.com/url-delivered-ransomware/ "Ransomware Delivery URLs: Top Campaigns and Trends") ### Table of Contents * ### Related Articles * [Threat Brief: Citrix Bleed CVE-2023-4966](https://unit42.paloaltonetworks.com/threat-brief-cve-2023-4966-netscaler-citrix-bleed/ "article - table of contents") * [APT41 Using New Speculoos Backdoor to Target Organizations Globally](https://unit42.paloaltonetworks.com/apt41-using-new-speculoos-backdoor-to-target-organizations-globally/ "article - table of contents") * [Exploits in the Wild for Citrix ADC and Citrix Gateway Directory Traversal Vulnerability CVE-2019-19781](https://unit42.paloaltonetworks.com/exploits-in-the-wild-for-citrix-adc-and-citrix-gateway-directory-traversal-vulnerability-cve-2019-19781/ "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. 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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. 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