HIGH 7.0 Microsoft
CVE-2026-20863
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 Server 2025 (Server Core installation)
- Windows 11 Version 25H2 for ARM64-based Systems
- Windows 11 Version 25H2 for x64-based Systems
- 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-2026-20863
- https://nvd.nist.gov/vuln/detail/CVE-2026-20863
This high severity vulnerability with a CVSS score of 7.0 was published on 2026-01-13 via Microsoft. Affected: Windows Server 2022, Windows Server 2022 (Server Core installation), Windows Server 2025 (Server Core installation) and 5 more.
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