Official support for Windows 10 has ended, and its security certificates are expiring. Your system is at risk, and Microsoft ...

A zero-day vulnerability in Microsoft Defender lets attackers gain full system access on up-to-date Windows 10 and 11 PCs. No ...

Why it matters: Microsoft Defender, the security software built into Windows, is under pressure from a flaw that has now been linked to ransomware, according to federal cybersecurity officials. The ...

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CISA confirmed on Monday that ransomware gangs have begun exploiting a high-severity Microsoft Defender privilege escalation vulnerability that has previously been abused in zero-day attacks. Dubbed ...

Windows Defender "BlueHammer" vulnerability now exploited as part of malware campaigns — event demonstrates lack of security ...

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

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 ...

The zero-day "nightmare" apparently isn't over for Microsoft, as a disgruntled researcher who's been feuding with the company for the past three months has dropped yet another proof-of-concept (PoC) ...

A new Microsoft Defender zero-day called RoguePlanet reportedly grants SYSTEM privileges on fully patched Windows 10 and Windows 11 devices.