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Microsoft Scrambles To Patch ShieldBreak Zero-Day Flaw In Windows Defender

Summary by HotHardware
Microsoft nemesis Nightmare-Eclipse is at it again, this time with a bypass exploit for his original RoguePlanet Windows Defender privilege escalation exploit. The new exploit, dubbed ShieldBreak, also allows for elevation of privilege within Microsoft Defender. Based on what we know about RoguePlanet, that exploit hinged on a race condition
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Microsoft appears to have created a new problem in its attempt to close a serious vulnerability in Windows Defender, a so-called zero day vulnerability, i.e. a security flaw that the company has not been able to fix. Microsoft messed up Defender in attempt to close against ShieldBreak Even worse it will be if the manufacturer, in this case Microsoft, messes it up. Now Windows users report that Microsoft Defender is no longer able to complete eit…

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HotHardware broke the news on Tuesday, August 18, 2026.
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