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

The Hacker News

May 20, 2026 at 8:28 AM

Windows CVE Zero-day Microsoft Exploit Vulnerability

Overview

Microsoft has addressed a significant vulnerability in its BitLocker encryption feature, identified as YellowKey and tracked under the CVE-2026-45585 designation. This security flaw, which has a CVSS score of 6.8, allows attackers to bypass key protections, potentially exposing sensitive data on affected systems. The issue was publicly disclosed last week, prompting Microsoft to issue a mitigation to protect users. This vulnerability primarily affects Windows operating systems that utilize BitLocker for disk encryption. Given that BitLocker is widely used by businesses and individuals to secure data, the implications of this flaw are serious, making it crucial for users to implement the provided mitigation as soon as possible.

Key Takeaways

Affected Systems: Windows operating systems utilizing BitLocker encryption
Action Required: Microsoft has released a mitigation for the YellowKey vulnerability.
Timeline: Disclosed on [date]

Original Article Summary

Microsoft on Tuesday released a mitigation for a BitLocker bypass vulnerability named YellowKey following its public disclosure last week. The zero-day flaw, now tracked as CVE-2026-45585, carries a CVSS score of 6.8. It has been described as a BitLocker security feature bypass. "Microsoft is aware of a security feature bypass vulnerability in Windows publicly referred to as 'YellowKey,'" the

Impact

Windows operating systems utilizing BitLocker encryption

Exploitation Status

No active exploitation has been reported at this time. However, organizations should still apply patches promptly as proof-of-concept code may exist.

Timeline

Disclosed on [date]

Remediation

Microsoft has released a mitigation for the YellowKey vulnerability. Users are advised to apply this mitigation to safeguard their systems.

Additional Information

This threat intelligence is aggregated from trusted cybersecurity sources. For the most up-to-date information, technical details, and official vendor guidance, please refer to the original article linked below.

Related Topics: This incident relates to Windows, CVE, Zero-day, and 3 more.

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