A bad security intelligence update causes Microsoft Defender to crash during Full and Quick Scans on some PCs. Upgrading to ...

Microsoft says a new Defender capability isolated a compromised device and stopped a ransomware attack in 128 seconds. Security experts explain what it means—and its limits.

Microsoft has resolved a bug that caused Windows Defender to crash after a recent security update, resulting in 0xc0000005 ...

Join our daily and weekly newsletters for the latest updates and exclusive content on industry-leading AI coverage. Learn More Researchers at SentinelOne‘s SentinelLabs today disclosed five critical ...

Microsoft is working on a security patch for the "ShieldBreak" zero-day vulnerability disclosed last week by security ...

Azure Defender will be able to protect Linux servers via a capability at the preview stage arriving on June 14, Microsoft announced on Thursday. Last month, Microsoft had announced support in its ...

The PoC posted by Nightmare Eclipse, who has been feuding with Microsoft for months, enables an attacker with any level of ...

The Nightmare-Eclipse and Microsoft saga continues with another major Windows Defender exploit following 'RoguePlanet.' ...

ShieldBreak is a claimed patch bypass for Defender flaw CVE-2026-50656, with a PoC tested on Windows 11 25H2 and Server 2025.

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 ...

After rebranding Windows Defender as Microsoft Defender in early 2019, Microsoft is renaming and bringing more products under the Defender brand, the company announced today at its yearly Ignite ...