CyberICT

CVE-2026-54127

Microsoft · Published July 14, 2026

CVSS v3.1

HIGH
Patch availableGet patch

Description

Windows Hyper-V Elevation of Privilege Vulnerability. Use after free in Windows Hyper-V allows an unauthorized attacker to elevate privileges locally.

Affected Products

  • Windows Server 2022
  • Windows Server 2025 (Server Core installation)
  • Windows 11 Version 25H2 for ARM64-based Systems
  • Windows 11 Version 25H2 for x64-based Systems

CVSS Vector

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