Input validation error in Windows Server - CVE-2026-27913
Published: April 15, 2026
Vulnerability identifier: #VU126223
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-27913
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local attacker to compromise the target system.
The vulnerability exists due to insufficient validation of user-supplied input in Windows BitLocker. A local attacker can bypass Secure Boot.
Affected software
Windows Server
How to mitigate CVE-2026-27913
Install updates from vendor's website.
Windows Server - addressed in versions 2012 R2 6.3.9600.23132, 2012 6.2.9200.26026, 2016 10.0.14393.9060, 2019 10.0.17763.8644, 2022 23H2 10.0.25398.2274, 2022 10.0.20348.5020