May 2026: Windows BitLocker Security Feature Bypass Vulnerability
CVE-2026-45585 Published on May 19, 2026

Windows BitLocker Security Feature Bypass Vulnerability
Microsoft is aware of a security feature bypass vulnerability in Windows publicly referred to as "YellowKey". The proof of concept for this vulnerability has been made public violating coordinated vulnerability best practices. We are issuing this CVE to provide mitigation guidance that can be implemented to protect against this vulnerability until the security update is made available.

Vendor Advisory NVD

Weakness Type

What is a Command Injection Vulnerability?

The software constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.

CVE-2026-45585 has been classified to as a Command Injection vulnerability or weakness.


Products Associated with CVE-2026-45585

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Microsoft Windows Server 2025
 
Microsoft Windows 11 2h2
 
Microsoft Windows 11 24h2
 
Microsoft Windows 11 26h1
 

Affected Versions

Microsoft Windows 11 Version 24H2: Microsoft Windows 11 Version 25H2: Microsoft Windows 11 version 26H1: Microsoft Windows Server 2025: Microsoft Windows Server 2025 (Server Core installation):