CyberICT

CVE-2026-40407

Microsoft · Published May 12, 2026

CVSS v3.1

HIGH
Patch availableGet patch

Description

Windows Common Log File System Driver Elevation of Privilege Vulnerability. Heap-based buffer overflow in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.

Affected Products

  • Windows Server 2022 (Server Core installation)
  • Windows Server 2019
  • Windows Server 2022
  • Windows 10 Version 1809 for 32-bit 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