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Microsoft working on Defender patch for ShieldBreak zero-day

Summary by BleepingComputer
Microsoft is working on a security patch for the

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Windows operating system users should install new security updates as quickly as possible. Microsoft has released a robust patch package that addresses nearly 400 vulnerabilities, including several that are already actively being exploited by cybercriminals. The measure is crucial to protect data and prevent invasions on personal and corporate computers. Microsoft [...]

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Just a few weeks after Microsoft's threat of legal action against uncoordinated zero-day releases, a new vulnerability emerges. "ShieldBreak is intended to affect Windows 10, Windows 11 and Windows Server 2025. A specific patch is not yet available.

Security researcher Chaotic Eclipse has released a new proof-of-concept exploit that exploits a vulnerability in Microsoft Defender. ShieldBreak is designed to bypass the Microsoft patch for the so-fixed RoguePlanet vulnerability. Affected is Windows 10, 11 – including version 25H2 – and Windows Server 2025. Known as RoguePlanet, the CVE-2026-50656 vulnerability allows an attacker to significantly expand its own rights on a Windows system, resul…

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BleepingComputer broke the news in Melville, United States on Monday, August 17, 2026.
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