Integer overflow in Microsoft Windows and Windows Server - CVE-2026-42896
Published: May 12, 2026
Vulnerability identifier: #VU131241
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-42896
CWE-ID: CWE-190
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to escalate privileges on the target system.
The vulnerability exists due to integer overflow in Windows DWM Core Library. A local user can trigger integer overflow and gain elevated privileges on the target system.
Affected software
Microsoft Windows
Windows Server
Windows Server
How to mitigate CVE-2026-42896
Install updates from vendor's website.
Microsoft Windows - addressed in versions 11 24H2 10.0.26100.8390, 11 24H2 10.0.26100.8457, 11 25H2 10.0.26200.8390, 11 25H2 10.0.26200.8457, 11 26H1 10.0.28000.2113
Windows Server - addressed in versions 2025 10.0.26100.32772, 2025 10.0.26100.32860
Windows Server - addressed in versions 2025 10.0.26100.32772, 2025 10.0.26100.32860