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'BigDiskBuster' Leaves Microsoft Defender Running While Blocking Updates

Dark Reading·October 6, 2026·1 min read
'BigDiskBuster' Leaves Microsoft Defender Running While Blocking Updates

A new proof-of-concept cyber technique called 'BigDiskBuster' leaves Microsoft Defender running while blocking updates, creating a silent virus detection gap. No exploit is required, and the service appears normal. The flaw allows attackers to evade detection without triggering alerts, highlighting a significant security gap in endpoint protection.

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