#VU126185 Reliance on Untrusted Inputs in a Security Decision in Windows and Windows Server - CVE-2026-0390
Published: April 15, 2026
Vulnerability identifier: #VU126185
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-0390
CWE-ID: CWE-807
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Windows
Windows Server
Windows
Windows Server
Software vendor:
Microsoft
Microsoft
Description
The vulnerability allows a local user to compromise the target system.
The vulnerability exists due to reliance on untrusted input for a security decision in UEFI Secure Boot. A local administrator can bypass authentication feature and cause impersonation.
Remediation
Install updates from vendor's website.