GreatXML Zero-Day Enables BitLocker Bypass Through Windows Defender Offline Scan

A newly disclosed zero-day vulnerability dubbed “GreatXML” is raising serious concerns across the Windows security ecosystem, as it enables a practical BitLocker bypass by abusing the Windows Defender Offline Scan mechanism and Windows Recovery Environment (WinRE). The issue, published by a researcher known as “MSNightmare” (Nightmare Eclipse), demonstrates how systems that have previously initiated a […]

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