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NightmareEclipse's latest zero-day leaves Microsoft Defender stuck in the past

BigDiskBuster leaves Microsoft's antivirus running but unable to install updates

The Register 3 newsrooms Tue, 22 Sep 2026 16:36

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Also reported by 2 other newsrooms

The Hacker NewsResearcher Drops BigDiskBuster Zero-Day PoC That Blocks Microsoft Defender Updates BleepingComputerNew Windows Defender zero-day blocks Microsoft antivirus updates