High severity7.8NVD Advisory· Published May 12, 2026· Updated May 14, 2026
CVE-2026-40377
CVE-2026-40377
Description
Heap-based buffer overflow in Windows Cryptographic Services 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
1- msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40377nvdVendor Advisory
News mentions
2- Patch Tuesday - May 2026Rapid7 Blog · May 13, 2026
- Microsoft May 2026 Patch Tuesday fixes 120 flaws, no zero-daysBleepingComputer · May 12, 2026