CVE-2026-50656: Microsoft Confirms Defender ‘RoguePlanet’ Zero-Day — No Patch Available Yet
Microsoft has confirmed CVE-2026-50656, a zero-day TOCTOU race condition in Microsoft Defender dubbed 'RoguePlanet,' that allows low-privilege attackers to escalate to SYSTEM on fully patched Windows 10 and...
CISA Adds Two Actively Exploited Microsoft Defender Zero-Days to KEV Catalog — Patch by June 3
CISA has added two critical Microsoft Defender vulnerabilities — CVE-2026-45498 and CVE-2026-41091 — to its Known Exploited Vulnerabilities catalog following evidence of active exploitation in the wild. Federal...
Microsoft Defender False Positive Quarantines DigiCert Root Certificates, Risks Breaking SSL Across Enterprise Networks
A faulty Microsoft Defender antimalware definition update incorrectly flagged two legitimate DigiCert root certificates as malware, automatically quarantining them from the Windows trust store on enterprise endpoints. The...
PoC Exploit Leaked for Unpatched Windows Privilege Escalation Zero-Day ‘BlueHammer’
A disgruntled researcher has published a working exploit for BlueHammer, an unpatched Windows local privilege escalation zero-day that abuses Windows Defender's update mechanism. Fully patched Windows 10, 11,...