High severity8.4NVD Advisory· Published May 12, 2026· Updated May 13, 2026
CVE-2026-40363
CVE-2026-40363
Description
Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
1News mentions
3- Microsoft Patch Tuesday for May 2026 — Snort rules and prominent vulnerabilitiesCisco Talos Intelligence · May 12, 2026
- Microsoft May 2026 Patch Tuesday fixes 120 flaws, no zero-daysBleepingComputer · May 12, 2026
- May 2026 Patch Tuesday: 30 Critical Vulnerabilities Among 130 CVEsCrowdStrike Blog