[![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/cve-2020-4006/) * [Japanese](https://unit42.paloaltonetworks.com/ja/cve-2020-4006/) * [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: VMware Command Injection Vulnerability (CVE-2020-4006) ![Clock Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-clock.svg) 2 min read * ![Profile Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-profile-grey.svg) By: * [Shawn Westfall](https://unit42.paloaltonetworks.com/author/shawn-westfall/) * ![Published Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-calendar-grey.svg) Published:December 9, 2020 * ![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-2020-4006](https://unit42.paloaltonetworks.com/tag/cve-2020-4006/) * [VMware](https://unit42.paloaltonetworks.com/tag/vmware/) * [![Download Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-download.svg)](https://unit42.paloaltonetworks.com/cve-2020-4006/?pdf=download&lg=en&_wpnonce=8eff5d0d06 "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-2020-4006/?pdf=print&lg=en&_wpnonce=8eff5d0d06 "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%2Fcve-2020-4006%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%2Fcve-2020-4006%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 On Dec. 7, 2020, the [National Security Agency (NSA) published a cybersecurity advisory](https://media.defense.gov/2020/Dec/07/2002547071/-1/-1/0/CSA_VMWARE%20ACCESS_U_OO_195076_20.PDF) indicating they observed Russian state-sponsored actors exploiting a VMware command injection vulnerability (CVE-2020-4006). [VMware issued a patch](https://kb.vmware.com/s/article/81754) for the vulnerability on Dec. 3, 2020. The vulnerability affects the following VMware products: * VMware Access®3 20.01 and 20.10 on Linux®4 * VMware vIDM®5 3.3.1, 3.3.2 and 3.3.3 on Linux * VMware vIDM Connector 3.3.1, 3.3.2, 3.3.3, 19.03 * VMware Cloud Foundation®6 4.x * VMware vRealize Suite Lifecycle Manager®7 8.x The vulnerability requires network access to the administrative configurator on port 8443 (though this can be configured to be any port) and a valid password for the configurator admin account. If these conditions exist, a malicious actor could execute commands with unrestricted privileges on the underlying operating system. ## Mitigation Actions First and foremost, [patch](https://kb.vmware.com/s/article/81754) the vulnerable software if at all possible. If, for some reason, the vulnerable software cannot be patched, then refer to the following workarounds: **Warning:** **This workaround is applicable ONLY to VMware Workspace ONE Access, VMware Identity Manager and VMware Identity Manager Connector. Do not apply this workaround to other VMware products.** To implement the workaround for CVE-2020-4006, perform the following steps below. Please note the operating system. 1. Implement workaround for Linux-based appliances: 2. 1. 1. Use SSH to connect to appliance using "sshuser" credentials configured during installation or updated later. 2. Switch to root by typing su and provide "root" credentials configured during installation or updated later. 3. Run the following commands: cd /opt/vmware/horizon//workspace mkdir webapps.tmp mv webapps/cfg webapps.tmp mv conf/Catalina/localhost/cfg.xml webapps.tmp service horizon-workspace restart Repeat steps for all Linux-based appliances affected by CVE-2020-4006. 2. Implement workaround for Windows-based servers: 3. 1. 1. Log in as Administrator. 2. Open a Command Prompt window and run the following commands: Net stop "VMwareIDMConnector" cd \\VMware\\VMwareIdentityManager\\Connector\\opt\\vmware\\horizon\\workspace mkdir webappstmp move webapps\\cfg webappstmp move conf\\Catalina\\localhost\\cfg.xml webappstmp net start "VMwareIDMConnector" Repeat steps for all Windows-based servers affected by CVE-2020-4006. **To remove the workaround for CVE-2020-4006, perform the following steps:** 1. Revert workaround for Linux-based appliances. 2. 1. 1. Use SSH to connect to appliance using "sshuser" credentials configured during installation or updated later. 2. Switch to root by typing su and provide "root" credentials configured during installation or updated later. 3. Run the following commands: cd /opt/vmware/horizon/workspace mv webapps.tmp/cfg webapps mv webapps.tmp/cfg.xml conf/Catalina/localhost rmdir webapps.tmp service horizon-workspace restart Repeat steps for all Linux-based appliances affected by CVE-2020-4006. 2. Revert workaround for Windows-based servers 3. 1. 1. Log in as Administrator. 2. Open a Command Prompt window and run the following commands: net stop "VMwareIDMConnector" cd \\VMware\\VMwareIdentityManager\\Connector\\opt\\vmware\\horizon\\workspace move webappstmp\\cfg webapps move webappstmp\\cfg.xml conf\\Catalina\\localhost rmdir webappstmp net start "VMwareIDMConnector" Repeat steps for all Windows-based servers affected by CVE-2020-4006. ## Conclusion Palo Alto Networks is continuing efforts to identify a proof of concept (PoC) or other relevant information that would allow specific coverage for exploitation of this vulnerability. Due to the lack of specific attack details related to exploitation, Palo Alto Networks highly recommends patching your vulnerable software when possible and/or implementing the workaround provided by VMWare. This blog will be updated when more information becomes available. Back to top ### Tags * [CVE-2020-4006](https://unit42.paloaltonetworks.com/tag/cve-2020-4006/ "CVE-2020-4006") * [VMware](https://unit42.paloaltonetworks.com/tag/vmware/ "VMware") [Threat Research Center](https://unit42.paloaltonetworks.com "Threat Research") [Next: njRAT Spreading Through Active Pastebin Command and Control Tunnel](https://unit42.paloaltonetworks.com/njrat-pastebin-command-and-control/ "njRAT Spreading Through Active Pastebin Command and Control Tunnel") ### Table of Contents * ### Related Articles * [Threat Brief: VMware Vulnerabilities Exploited in the Wild (CVE-2022-22954 and Others)](https://unit42.paloaltonetworks.com/cve-2022-22954-vmware-vulnerabilities/ "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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