CyberICT

CVE-2026-21248

Microsoft · Published February 10, 2026

CVSS v3.1

HIGH
Patch availableGet patch

Description

Windows Hyper-V Remote Code Execution Vulnerability. Heap-based buffer overflow in Windows Hyper-V allows an authorized attacker to execute code locally.

Affected Products

  • Windows 10 Version 1809 for x64-based Systems
  • Windows Server 2019
  • Windows Server 2019 (Server Core installation)
  • Windows Server 2022

CVSS Vector

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