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

A security vulnerability was recently discovered in Microsoft Defender, the first-party Windows 11 antivirus tool used by millions. Attackers can exploit this vulnerability to gain elevated system ...

The BlueHammer, RedSun and UnDefend flaws put all Windows users at risk since they turn the operating system’s antivirus ...

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

The Huntress SOC is observing the use of Nightmare-Eclipse's BlueHammer, RedSun, and UnDefend exploitation techniques. Investigation by: @wbmmfq, @Curity4201, + @_JohnHammond 🧵👇 ...

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

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

Microsoft has fixed a Windows 11 24H2 bug affecting facial scans. Impacted users are no longer blocked from installing 24H2. Three reported issues with 24H2 still need to be resolved. Microsoft has ...

Scammers are using fake Windows Defender pop-ups with real looking phone numbers to trick users. These fraudulent warnings are not from Microsoft and aim to gain remote access to your computer. A ...

Microsoft is working to resolve a bug that causes Defender for Endpoint to incorrectly tag some devices' BIOS (Basic Input/Output System) firmware as outdated, prompting users to update it. In a ...

Q: Are Windows Defender warnings that pop up with a phone number legit? A: Microsoft’s built-in security tool has improved over the years, and it still blocks plenty of everyday threats. But the ...