Missing Authentication for Critical Function in Windows Server - CVE-2026-88245
Published: November 11, 2026
Vulnerability identifier: #VU165582
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-2026-88245
CWE-ID: CWE-306
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 missing authentication for a critical function in Windows Brokering File System when critical functionality is invoked locally. A local user can invoke the affected functionality without the required authentication checks to gain SYSTEM privileges.
Affected software
Windows Server
How to mitigate CVE-2026-88245
Install security update from vendor's website.
Windows Server - addressed in versions 2025 10.0.26100.33730, 2025 10.0.26100.33822