Microsoft is pushing out a fix to a bigger number of affected computers, but your PC may need your help to receive them.

CISA confirmed on Monday that ransomware gangs are now exploiting a Microsoft Defender privilege escalation vulnerability, dubbed BlueHammer, that has previously been abused in zero-day attacks.

CISA says ransomware gangs are exploiting Microsoft Defender’s BlueHammer flaw, patched in April 2026 after zero-day reports.

This month’s updates help security and IT teams strengthen identity and multicloud foundations, protect data wherever it ...