Defender zero-day tool blocks updates, patch unavailable
A researcher released an unpatched tool, BigDiskBuster, that prevents Microsoft Defender from installing updates by filling available disk space during the process. Microsoft has not issued a patch, advisory, or CVE for this attack, and no independent party has verified the tool's claims. The tool’s author, a former Microsoft security researcher, previously released similar exploits later used in attacks.
- Tool fills disk to block Defender updates
- No patch or workaround currently available
- No confirmation yet from independent researchers
- Tool released by ex-Microsoft security researcher
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