High severity8.4NVD Advisory· Published May 12, 2026· Updated May 22, 2026
CVE-2026-40363
CVE-2026-40363
Description
Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
Affected products
1Patches
Vulnerability mechanics
References
1- msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40363nvdVendor Advisory
News 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