HIGH 7.8 Microsoft

CVE-2026-20920

Win32k Elevation of Privilege Vulnerability

Microsoft Security Update 2026-Jan: Win32k Elevation of Privilege Vulnerability

Affected Products

Windows Server 2022
Windows Server 2022 (Server Core installation)
Windows 11 Version 23H2 for ARM64-based Systems
Windows 11 Version 23H2 for x64-based Systems
Windows Server 2022, 23H2 Edition (Server Core installation)

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20920
https://nvd.nist.gov/vuln/detail/CVE-2026-20920

Published: 2026-01-13 · Source: Microsoft · Feed updated: 2026-08-04

This high severity vulnerability with a CVSS score of 7.8 was published on 2026-01-13 via Microsoft. Affected: Windows Server 2022, Windows Server 2022 (Server Core installation), Windows 11 Version 23H2 for ARM64-based Systems and 2 more.

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