CyberICT

CVE-2026-40420

Microsoft · Published May 12, 2026

CVSS v3.1

HIGH
Patch availableGet patch

Description

Microsoft Office Click-To-Run Elevation of Privilege Vulnerability. Use after free in Microsoft Office allows an authorized attacker to elevate privileges locally.

Affected Products

  • Microsoft Office 2019 for 32-bit editions
  • Microsoft Office 2019 for 64-bit editions
  • Microsoft 365 Apps for Enterprise for 32-bit Systems
  • Microsoft 365 Apps for Enterprise for 64-bit Systems

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