New BitUnlocker Downgrade Attack on Windows 11 Allows Access to Encrypted Disks in 5 Minutes
RedSide Security May 13, 2026 Vulnerability 153 views
Researchers have unveiled BitUnlocker, a new downgrade attack capable of bypassing Microsoft BitLocker encryption on patched Windows 11 systems in under five minutes. The attack abuses a flaw in the Windows Recovery Environment (WinRE) and a trusted legacy Secure Boot certificate to boot vulnerable components, allowing attackers with physical access to decrypt protected drives without triggering security alerts.
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