BlueHammer became public on April 2 in an unusual fashion. A researcher using the names Chaotic Eclipse and Nightmare Eclipse ...

MCP tool poisoning turns trusted AI agents into a control plane for data loss. Learn how threat actors manipulate tool ...

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.

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A new Windows zero-day reportedly bypasses BitLocker, adding pressure on Microsoft as researchers debate the exploit’s real-world impact. A new Windows zero-day has turned BitLocker, one of ...

Security researcher Chaotic Eclipse (aka Nightmare-Eclipse and MSNightmare) has released a new Windows BitLocker bypass dubbed GreatXML, a day after they published an exploit for Microsoft Defender.

Record Patch Volume: The June 2026 Patch Tuesday marked Microsoft's largest security update, fixing up to 208 vulnerabilities across its platforms. Defender Exploit Streak: Microsoft Defender has been ...

The long-running feud between Microsoft and security researcher Nightmare Eclipse has entered a new chapter. Eclipse, who has spent the past several months publicly releasing unpatched Windows ...

Exploiting a race condition in Microsoft Defender, the exploit leads to local privilege escalation to SYSTEM. A security researcher has released another zero-day exploit targeting Microsoft’s Windows ...

A zero-day exploit called RoguePlanet dropped on June 10, 2026, the same day Microsoft rolled out its monthly Patch Tuesday updates. The timing was not a coincidence. The proof-of-concept code targets ...

This method involves modifying a Registry value called DisableAntiSpyware. In older versions of Windows, this policy key was used by OEMs and IT administrators to disable Microsoft Defender Antivirus ...