An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory, aka 'Win32k

Summary

This vulnerability affects Microsoft Windows, specifically its Win32k component, which is a core part of the operating system's graphical interface. An attacker who can run code on a affected system could exploit it to gain higher privileges than they should have.

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

Timeline

1. Apr 9, 2019, 2:34 AM UTCCVE published
2. Nov 3, 2021Added to CISA KEV

   CISA has evidence of exploitation in the wild

3. May 3, 2022CISA remediation deadline

   Due date for US federal agencies to patch

4. Oct 21, 2025, 11:45 PM UTCRecord last updated

Affected versions

• Microsoft Windows Server

  2012, 2012 (Core installation), 2012 R2, 2012 R2 (Core installation), 2016, 2016 (Core installation), version 1709 (Core Installation), version 1803 (Core Installation), 2019, 2019 (Core installation)

• Microsoft Windows

  8.1 for 32-bit systems, 8.1 for x64-based systems, RT 8.1, 10 for 32-bit Systems, 10 for x64-based Systems, 10 Version 1607 for 32-bit Systems, 10 Version 1607 for x64-based Systems, 10 Version 1703 for 32-bit Systems, 10 Version 1703 for x64-based Systems, 10 Version 1709 for 32-bit Systems, 10 Version 1709 for x64-based Systems, 10 Version 1803 for 32-bit Systems, 10 Version 1803 for x64-based Systems, 10 Version 1803 for ARM64-based Systems, 10 Version 1809 for 32-bit Systems, 10 Version 1809 for x64-based Systems, 10 Version 1809 for ARM64-based Systems, 10 Version 1709 for ARM64-based Systems

References 1