Integer overflow in Microsoft Windows - CVE-2026-88074
Published: October 14, 2026
Vulnerability identifier: #VU155284
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-2026-88074
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 to SYSTEM.
The vulnerability exists due to integer overflow or wraparound in Windows Virtualization-Based Security (VBS) Enclave when the enclave is used locally. A local user can trigger the integer overflow to escalate privileges to SYSTEM.
Affected software
Microsoft Windows
How to mitigate CVE-2026-88074
Install security update from vendor's website.
Microsoft Windows - addressed in versions 11 23H2 10.0.22631.7652, 11 24H2 10.0.26100.9711, 11 25H2 10.0.26200.9711, 11 26H1 10.0.28000.3231