CyberICT

CVE-2026-100203

Microsoft · Published October 13, 2026

CVSS v3.1

HIGH
Patch availableGet patch

Description

Windows Update Service Elevation of Privilege Vulnerability. Heap-based buffer overflow in Windows Update Service allows an authorized attacker to elevate privileges locally.

Affected Products

  • Windows 11 Version 26H2 for x64-based Systems
  • Windows Server 2025
  • Windows Server 2025 (Server Core installation)
  • Windows 11 Version 26H1 for ARM64-based Systems

CVSS Vector

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