CyberICT

CVE-2026-20811

Microsoft · Published January 13, 2026

CVSS v3.1

HIGH
Patch availableGet patch

Description

Win32k Elevation of Privilege Vulnerability. Access of resource using incompatible type ('type confusion') in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally.

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

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C