CyberICT

CVE-2026-21255

Microsoft · Published February 10, 2026

CVSS v3.1

HIGH
Patch availableGet patch

Description

Windows Hyper-V Security Feature Bypass Vulnerability. Improper access control in Windows Hyper-V allows an authorized attacker to bypass a security feature locally.

Affected Products

  • Windows 11 Version 26H1 for ARM64-based Systems
  • Windows 11 version 26H1 for x64-based Systems
  • Windows 10 Version 1809 for x64-based Systems
  • Windows Server 2019

CVSS Vector

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