Microsoft Releases Mitigation for YellowKey BitLocker Bypass CVE-2026-45585 Exploit
In May 2026, a security researcher known as Nightmare-Eclipse publicly disclosed a vulnerability named 'YellowKey' (CVE-2026-45585) affecting Windows 11 and Windows Server 2025. This flaw allows attackers with physical access to bypass BitLocker encryption by exploiting the Windows Recovery Environment (WinRE), thereby gaining unauthorized access to encrypted data. The exploit involves placing specially crafted 'FsTx' files on a USB drive, booting into WinRE, and triggering an unrestricted shell with full access to the encrypted volume. The public disclosure of YellowKey highlights the ongoing risks associated with physical access attacks and underscores the importance of robust security measures beyond software-based protections. Organizations must reassess their physical security protocols and implement additional safeguards, such as requiring a PIN at startup, to mitigate such vulnerabilities.
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