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

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

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

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

A researcher known as "Chaotic Eclipse" has published a proof-of-concept exploit for a second Microsoft Defender zero-day, ...

A security vulnerability was recently discovered in Microsoft Defender, the first-party Windows 11 antivirus tool used by ...

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

In a blog post, Microsoft says Defender is enough for most Windows 11 users. No extra antivirus needed if you keep defaults ...

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 ...

Windows 11 users may not need third-party antivirus, according to Microsoft, which says Defender delivers strong default protection for everyday use.

Microsoft’s April 2026 Patch Tuesday fixes 165 vulnerabilities, including two zero-days, in one of the company’s largest ...