BlackX UEFI bootkit infects fully patched Windows PCs despite Microsoft Secure Boot fixes
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A bootkit tracked as BlackX compromised organizations that had installed every Microsoft patch issued after BlackLotus, the first publicly documented in-the-wild UEFI bootkit to bypass Secure Boot on fully updated Windows 11 in 2023. Microsoft patched BlackLotus’s vulnerability in 2022 and added certificate and revocation updates in 2023–2024, yet victims were fully updated. The article ties the new infections to unclear Secure Boot protections rather than missing patches alone.
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