Input validation error in Windows - CVE-2026-27906
Published: April 14, 2026
Vulnerability identifier: #VU126020
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-27906
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Microsoft
Affected software:
Windows
Windows
Detailed vulnerability description
The vulnerability allows a local user to gain access to sensitive information on the system.
The vulnerability exists due to insufficient validation of user-supplied input in Windows Hello. A local administrator can bypass protection mechanisms and gain access to sensitive information on the target system.
How to mitigate CVE-2026-27906
Install updates from vendor's website.