CVE-2021-36934

Windows Elevation of Privilege Vulnerability

CVE-2021-36934 is fixed in 15 products on 1 platform, first by KB5005030, released August 10, 2021. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on February 10, 2022. Patch Radar priority: Patch now.

Patch nowCISA KEVPublicly disclosed
CVSS
7.8
Important
Exploitation
Exploited
Listed by CISA
CISA KEV
Feb 10, 2022
Federal due date Feb 24, 2022
EPSS
0.6725
99th percentile

<p>An elevation of privilege vulnerability exists because of overly permissive Access Control Lists (ACLs) on multiple system files, including the Security Accounts Manager (SAM) database. An attacker who successfully exploited this vulnerability could run arbitrary code with SYSTEM privileges. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.</p> <p>An attacker must have the ability to execute code on a victim system to exploit this vulnerability.</p> <p>After installing this security update, you <em>must</em> manually delete all shadow copies of system files, including the SAM database, to fully mitigate this vulnerabilty. <strong>Simply installing this security update will not fully mitigate this vulnerability.</strong> See <a href="https://support.microsoft.com/topic/1ceaa637-aaa3-4b58-a48b-baf72a2fa9e7">KB5005357- Delete Volume Shadow Copies</a>.</p>

Where it's fixed

ProductFixed inFixReleased
Microsoft
Windows 10 Version 1809 for 32-bit Systems 17763.2114 KB5005030 Aug 10, 2021
Windows 10 Version 1809 for ARM64-based Systems 17763.2114 KB5005030 Aug 10, 2021
Windows 10 Version 1809 for x64-based Systems 17763.2114 KB5005030 Aug 10, 2021
Windows 10 Version 1909 for 32-bit Systems 18363.1734 KB5005031 Aug 10, 2021
Windows 10 Version 1909 for ARM64-based Systems 18363.1734 KB5005031 Aug 10, 2021
Windows 10 Version 1909 for x64-based Systems 18363.1734 KB5005031 Aug 10, 2021
Windows 10 Version 2004 for 32-bit Systems KB5005033 Aug 10, 2021
Windows 10 Version 2004 for ARM64-based Systems KB5005033 Aug 10, 2021
Windows 10 Version 2004 for x64-based Systems KB5005033 Aug 10, 2021
Windows 10 Version 20H2 for 32-bit Systems KB5005033 Aug 10, 2021
Windows 10 Version 20H2 for ARM64-based Systems KB5005033 Aug 10, 2021
Windows 10 Version 20H2 for x64-based Systems KB5005033 Aug 10, 2021
Windows 10 Version 21H1 for 32-bit Systems KB5005033 Aug 10, 2021
Windows 10 Version 21H1 for ARM64-based Systems KB5005033 Aug 10, 2021
Windows 10 Version 21H1 for x64-based Systems KB5005033 Aug 10, 2021

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