Nightmare Eclipse has dropped ShieldBreak, a Windows zero-day exploit that allows any user to gain System privileges.

AI companies are increasingly looking for ways to mark content generated by their models. Now, someone has built an open-source tool designed to remove some of those marks. A GitHub project called ...

Nightmare Eclipse, the serial zero-day hunter who has an axe to grind with Microsoft, published a new Defender zero-day, ShieldBreak, that apparently bypasses Redmond’s RoguePlanet patch ...

A newly disclosed Microsoft Defender vulnerability, dubbed SheildBreak, could allow attackers to gain full system access. The flaw was published shortly after Microsoft's latest security update.

The 'ShieldBreak' flaw can let an attacker use Windows Defender to escalate their privileges on the OS. Microsoft previously ...

This is the latest zero-day released by security researcher Nightmare Eclipse, despite Microsoft publicly threatening to take legal action against them.

As part of August’s Patch Tuesday, Microsoft released security updates that address 398 new vulnerabilities. Alongside ...

First Akira Safe Mode attack disables endpoint detection and response but fails to encrypt, Huntress says - SiliconANGLE ...

Microsoft Defender zero-day vulnerability ShieldBreak can reportedly grant attackers SYSTEM privileges on fully patched Windows systems. Security researcher Nightmare Eclipse disclosed ShieldBreak as ...

A researcher released ShieldBreak, an unverified Windows Defender zero-day that allegedly grants attackers SYSTEM-level privileges on fully patched systems. Nightmare Eclipse says ShieldBreak bypasses ...

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

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