CVE-2022-21882
Published 2022-01-11 · Updated 2026-08-15 · Source secure@microsoft.com
Summary
CVE-2022-21882 is a high-severity (CVSS 7.0) vulnerability in Microsoft Win32k. CISA added it to the Known Exploited Vulnerabilities catalog on February 4, 2022, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by February 18, 2022. CISA also lists it as known to be used in ransomware campaigns, so it should be prioritised accordingly. Microsoft has 390 vulnerabilities in the KEV catalog, 117 of them linked to ransomware.
All 390 known-exploited Microsoft vulnerabilities →Description
Win32k Elevation of Privilege Vulnerability
CVSS vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CISA Known-Exploited Vulnerability
Product: Microsoft — Win32k
Name: Microsoft Win32k Privilege Escalation Vulnerability
Date added: 2022-02-04 · Due: 2022-02-18
Required action: Apply updates per vendor instructions.
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-21882
- http://packetstormsecurity.com/files/166169/Win32k-ConsoleControl-Offset-Confusion-Privilege-Escalation.html
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-21882
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-21882