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ShieldBreak bypasses Microsoft’s patch for earlier Defender flaw

medmalwarebytes_blogPublished 2026-08-17

<p class="wp-block-paragraph">Microsoft Defender’s latest patch bypass shows a familiar problem.</p>

<p class="wp-block-paragraph">A newly disclosed Microsoft Defender flaw called ShieldBreak shows that fixing one attack path doesn&#8217;t always close every route to the same result. </p>

<p class="wp-block-paragraph">Microsoft has assigned ShieldBreak the identifier <a href="https://www.cve

Indicators of compromise

Original source: https://www.malwarebytes.com/blog/bugs/2026/08/shieldbreak-bypasses-microsofts-patch-for-earlier-defender-flaw