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Vulnerability
CISA Adds Two Actively Exploited Microsoft Defender Zero-Days to KEV Catalog — Patch by June 3
23 May 2026 dark6
CISA has added two critical Microsoft Defender vulnerabilities — CVE-2026-45498 and CVE-2026-41091 — to its Known Exploited Vulnerabilities catalog following...
Vulnerability
Microsoft Defender False Positive Quarantines DigiCert Root Certificates, Risks Breaking SSL Across Enterprise Networks
4 May 2026 dark6
A faulty Microsoft Defender antimalware definition update incorrectly flagged two legitimate DigiCert root certificates as malware, automatically quarantining them from...
Vulnerability
PoC Exploit Leaked for Unpatched Windows Privilege Escalation Zero-Day ‘BlueHammer’
13 April 2026 dark6
A disgruntled researcher has published a working exploit for BlueHammer, an unpatched Windows local privilege escalation zero-day that abuses Windows...