Integer overflow in Microsoft Windows and Windows Server - CVE-2026-119966
Published: November 11, 2026
Vulnerability identifier: #VU165385
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-119966
CWE-ID: CWE-190
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local privileged user to escalate privileges.
The vulnerability exists due to integer overflow or wraparound in Windows Graphics Kernel when performing arithmetic operations. A local privileged user can trigger the arithmetic error locally to escalate privileges.
Affected software
Microsoft Windows
Windows Server
Windows Server
How to mitigate CVE-2026-119966
Install security update from vendor's website.
Microsoft Windows - addressed in versions 11 23H2 10.0.22631.7711, 11 24H2 10.0.26100.9911, 11 24H2 10.0.26100.9974, 11 25H2 10.0.26200.9911, 11 25H2 10.0.26200.9974
Windows Server - addressed in versions 2025 10.0.26100.33730, 2025 10.0.26100.33822
Windows Server - addressed in versions 2025 10.0.26100.33730, 2025 10.0.26100.33822