CVE-2026-40403

HIGH CVSS 8.8 View on NVD ↗

Heap-based buffer overflow in Windows Win32K - GRFX allows an authorized attacker to execute code locally.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Published: May 12, 2026 18:17 UTC Modified: May 13, 2026 15:34 UTC