High severity8.8NVD Advisory· Published May 12, 2026· Updated May 13, 2026
CVE-2026-40420
CVE-2026-40420
Description
Improper access control in Microsoft Office Click-To-Run allows an authorized attacker to elevate privileges locally.
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
1News mentions
1- Microsoft May 2026 Patch Tuesday fixes 120 flaws, no zero-daysBleepingComputer · May 12, 2026