The zero-day vulnerabilities in Windows Defender named BlueHammer, RedSun, and UnDefend are apparently being attacked.

Chaotic Eclipse is at it again, this time releasing a zero-day for Microsoft Defender.

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

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

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

Microsoft fixes 169 vulnerabilities including exploited SharePoint CVE-2026-32201, prompting CISA remediation by April 28, ...

Claude Mythos discovered vulnerabilities that survived 27 years of human review. This technical breakdown covers how it works ...

If you're a Windows user, this is your monthly reminder to ensure you install all available security updates. Microsoft's November Patch Tuesday release fixes one zero-day vulnerability that has been ...

Microsoft’s latest Patch Tuesday updates fix 165 vulnerabilities, including a SharePoint zero-day that has been exploited in ...

What Anthropic is describing is literally a zero-day engine: "Engineers at Anthropic with no formal security training have ...

It's not clear how many people were compromised by this hacking campaign, but a security researcher said the hackers were ...

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