Win32k Elevation of Privilege Vulnerability

Summary

Microsoft Windows systems that include the Win32k kernel driver are affected by this vulnerability. An attacker who already has access to a vulnerable system could exploit it to gain higher, system-level privileges than they are authorized to have.

Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.

Timeline

1. Jan 11, 2022, 8:22 PM UTCCVE published
2. Feb 4, 2022Added to CISA KEV

   CISA has evidence of exploitation in the wild

3. Feb 18, 2022CISA remediation deadline

   Due date for US federal agencies to patch

4. Aug 15, 2026, 3:55 AM UTCRecord last updated
5. Oct 22, 2026EPSS reached 10%

   FIRST estimates at least a 10% chance of exploitation in the next 30 days

Affected versions

• Microsoft Windows 10 Version 1809

  From 10.0.17763.0 · fixed in 10.0.17763.2452

• Microsoft Windows 10 Version 1809

  From 10.0.0 · fixed in 10.0.17763.2452

• Microsoft Windows Server 2019

  From 10.0.17763.0 · fixed in 10.0.17763.2452

• Microsoft Windows Server 2019 (Server Core installation)

  From 10.0.17763.0 · fixed in 10.0.17763.2452

• Microsoft Windows 10 Version 1909

  From 10.0.0 · fixed in 10.0.18363.2037

• Microsoft Windows 10 Version 21H1

  From 10.0.0 · fixed in 10.0.19043.1466

• Microsoft Windows Server 2022

  From 10.0.20348.0 · fixed in 10.0.20348.469

• Microsoft Windows 10 Version 20H2

  From 10.0.0 · fixed in 10.0.19042.1466

• Microsoft Windows Server version 20H2

  From 10.0.0 · fixed in 10.0.19042.1466

• Microsoft Windows 11 version 21H2

  From 10.0.0 · fixed in 10.0.22000.434

• Microsoft Windows 10 Version 21H2

  From 10.0.19043.0 · fixed in 10.0.19044.1466

References 1