Win32k Elevation of Privilege Vulnerability

Summary

Microsoft Windows systems that include the Win32k kernel-mode driver are affected by this vulnerability. An attacker who can run code on an affected system could potentially gain higher privileges than they are authorized to have, such as SYSTEM-level control.

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

Timeline

1. Oct 13, 2021, 12:26 AM UTCCVE published
2. Apr 25, 2022Added to CISA KEV

   CISA has evidence of exploitation in the wild

3. May 16, 2022CISA remediation deadline

   Due date for US federal agencies to patch

4. Oct 21, 2025, 11:25 PM UTCRecord last updated

Affected versions

• Microsoft Windows 10 Version 1809

  From 10.0.0 · fixed in 10.0.17763.2237

• Microsoft Windows Server 2019

  From 10.0.0 · fixed in 10.0.17763.2237

• Microsoft Windows Server 2019 (Server Core installation)

  From 10.0.0 · fixed in 10.0.17763.2237

• Microsoft Windows 10 Version 1909

  From 10.0.0 · fixed in 10.0.18363.1854

• Microsoft Windows 10 Version 21H1

  From 10.0.0 · fixed in 10.0.19043.1288

• Microsoft Windows Server 2022

  From 10.0.0 · fixed in 10.0.20348.288

• Microsoft Windows 10 Version 2004

  From 10.0.0 · fixed in 10.0.19041.1288

• Microsoft Windows Server version 2004

  From 10.0.0 · fixed in 10.0.19041.1288

• Microsoft Windows 10 Version 20H2

  From 10.0.0 · fixed in 10.0.19042.1288

• Microsoft Windows Server version 20H2

  From 10.0.0 · fixed in 10.0.19042.1288

• Microsoft Windows 11 version 21H2

  From 10.0.0 · fixed in 10.0.22000.258

References 1