CyberICT

CVE-2026-102202

Microsoft · Published October 13, 2026

CVSS v3.1

HIGH
Patch availableGet patch

Description

Windows Container Isolation FS Filter Driver (unionfs.sys) Elevation of Privilege Vulnerability. Improper access control in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to elevate privileges locally.

Affected Products

  • Windows Server 2022
  • Windows Server 2022 (Server Core installation)
  • Windows 11 Version 26H1 for ARM64-based Systems
  • Windows 11 version 26H1 for x64-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