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

Microsoft is developing a patch for the ShieldBreak Defender zero-day, which can let local attackers gain SYSTEM privileges ...

Microsoft updates Defender for Windows 11, Windows 10, and Server installation images with security intelligence version ...

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

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

Learn how BitLocker, passkeys, Microsoft Defender, and other Windows 11 security features protect your data, accounts, apps, and devices.

Microsoft’s August Patch Tuesday fixes about 400 security flaws, including an actively exploited Windows zero-day and ...

Nightmare Eclipse has released a new Microsoft Defender zero-day exploit named "ShieldBreak" after Microsoft released the August 2026 Patch Tuesday security updates.

Recently, Microsoft delivered its latest Defender patches for Windows 11 ISOs. These definitions are released from time to time alongside the general security updates available during Patch Tuesday.

Sounding off: NightmareEclipse did it again. The security researcher who's been on a crusade against Microsoft has published a new zero-day flaw affecting all supported Windows versions. Redmond ...

In a proof-of-concept, a security researcher demonstrated how the Windows Security Center API can be used to block the scans by Microsoft’s built-in antivirus tool. Windows Defender can be tricked ...