#VU126021 Input validation error in Windows Server - CVE-2026-27928

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Main Vulnerability Database Vulnerabilities #VU126021

#VU126021 Input validation error in Windows Server - CVE-2026-27928

Published: April 14, 2026


Vulnerability identifier: #VU126021
Vulnerability risk: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-27928
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Windows Server
Software vendor:
Microsoft

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to insufficient validation of user-supplied input in Windows Hello. A remote attacker can bypass the MFA required for Windows Hello for Business PIN provisioning.


Remediation

Install updates from vendor's website.

External links