CVE-2026-40403CWE-122

Windows Graphics Component Remote Code Execution Vulnerability

High · published May 12, 2026

CVSS v3.1
8.8
EPSS
0%
Percentile
25.4
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C
CVSS v4.0
Not supplied
EPSS
0.00333 · 25.4th percentile
Weakness
CWE-122 · Heap-based Buffer Overflow
Published
2026-05-12T16:59Z
EPSS history
Timeline
  • 12 MAY 16:59Z
    Windows Graphics Component Remote Code Execution Vulnerability
    cvelistv5