A local elevation of privilege vulnerability exists in how splwow64.exe handles certain calls, aka 'Microsoft splwow64 Elevation of Privileg

Summary

The vulnerability affects splwow64.exe, a Windows component used for 32-bit print operations on 64-bit systems. An attacker with local access to an affected system could exploit it to gain higher privileges than they are authorized to have.

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

Timeline

1. Jul 15, 2019, 6:56 PM UTCCVE published
2. May 23, 2022Added to CISA KEV

   CISA has evidence of exploitation in the wild

3. Jun 13, 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 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

• Microsoft Windows 10 Version 1903 for 32-bit Systems

  Version range not reported

• Microsoft Windows 10 Version 1903 for x64-based Systems

  Version range not reported

• Microsoft Windows 10 Version 1903 for ARM64-based Systems

  Version range not reported

• Microsoft Windows Server, version 1903 (Server Core installation)

  Version range not reported

References 1