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

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

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

Microsoft has announced new features that extend its threat protection portfolio. The company is unifying solutions across Microsoft 365 security and Azure security as part of Microsoft Defender. At ...

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

The Microsoft Defender antivirus product built into Windows 10 and 11 is generally good enough at detecting and removing malware that most people don’t need to pay for a separate antivirus product.

Microsoft has announced several new capabilities for Microsoft Defender. The new features will protect devices from advanced attacks and emerging threats, the company said on Monday. Built-in ...

Microsoft just launched Microsoft Defender, a brand new security application that works on any platform. Microsoft Defender has apps for Android, iOS, macOS, and Windows, providing different security ...

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

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

Microsoft has confirmed it has fixed the Local Security Authority (LSA) is off issue with a recent update to Defender. The company is also pushing out new kernel-mode hardware stack protection.

Microsoft updates Defender in Windows install media to block threats during setup and close early security gaps.