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Disgruntled Researcher Discloses New Zero-Day in Windows Antivirus

Posted on August 12, 2026
By PC Mag
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1 min read

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Disgruntled Researcher Discloses New Zero-Day in Windows Antivirus

The 'ShieldBreak' flaw can let an attacker use Windows Defender to escalate their privileges on the OS. Microsoft previously threatened legal action against the researcher, Nightmare Eclipse.