Three proof-of-concept exploits are being used in active attacks against Microsoft's built-in security platform; two are ...

Although the team with Microsoft moved swiftly to patch the BlueHammer vulnerability, other exploits still threaten Microsoft ...

A security researcher frustrated with Microsoft has released the BlueHammer Windows zero-day exploit, telling the company, “I ...

Threat actors have been exploiting the BlueHammer Microsoft Defender vulnerability as a zero-day to gain System privileges.

RedSun exploit targets Microsoft Defender zero-day, granting SYSTEM access on fully patched Windows systems with no patch ...

Threat actors are exploiting three recently disclosed Windows security vulnerabilities in attacks aimed at gaining SYSTEM or ...

New PoC shows how Microsoft Defender can be tricked into rewriting malicious files into protected locations, enabling ...

Three Defender zero-days exploited since April 10, 2026, enabling privilege escalation and DoS, forcing isolation of affected ...

The exploit uses an insecure behavior of Windows Defender and a file API to secure system rights. It is still unpatched.

Microsoft has released the final version of security configuration baseline settings for Windows 11, version 22H2, downloadable today using the Microsoft Security Compliance Toolkit. "This release ...

A security researcher published details of three security vulnerabilities in Windows Defender, and the code used to exploit ...

Windows 11 security is now complete, with Defender replacing third-party antivirus through built-in real-time and behavioral ...