Microsoft Releases Mitigation for YellowKey BitLocker Bypass CVE-2026-45585 Exploit

Microsoft has issued a mitigation for the YellowKey vulnerability, a BitLocker bypass flaw tracked as CVE-2026-45585, which carries a CVSS score of 6.8. This security feature bypass vulnerability allows attackers to exploit a weakness in Windows, potentially compromising the security of encrypted data. The mitigation was released following public disclosure of the zero-day flaw, which has been the subject of active discussion involving Microsoft. The exploitation status of CVE-2026-45585 will determine whether immediate patching or ongoing monitoring is necessary¹. Technical details of the vulnerability are still emerging, but its designation as a security feature bypass suggests a potentially significant impact on Windows security. The release of a mitigation by Microsoft underscores the importance of addressing this vulnerability to prevent potential attacks. This development matters to security practitioners because it highlights the need for prompt action to protect against potential exploits of the YellowKey vulnerability.