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 ...

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

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 ...

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

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 ...

Check Point researchers found that Microsoft’s legitimate remediation driver can be weaponized for kernel-level file and ...

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 ...

BTR Reforged uses Defender's signed BTR.sys with an administrator account and SeLoadDriverPrivilege for kernel file and ...

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