🟠High: Researcher Drops New Microsoft Defender PoC Showing ShieldBreak Patch Can Be Bypassed
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The researcher known as Chaotic Eclipse has published a proof-of-concept for a new zero-day in Microsoft Defender, codenamed ShieldCrash. The flaw is assessed as a patch bypass for CVE-2026-69414, a vulnerability that carries a CVSS score of 7.8 and was previously reported by the same researcher under the name ShieldBreak.
According to the researcher, Microsoft failed to properly fix the original ShieldBreak issue tracked as CVE-2026-69414. The new ShieldCrash PoC demonstrates that the earlier patch can be circumvented.
Key details:
- CVE-2026-69414 is rated 7.8 on the CVSS scale, indicating a high-severity issue.
- The original bug was publicly referred to as ShieldBreak.
- The newly disclosed penetration test is called ShieldCrash and is described as a patch bypass.
Source: [email protected] (The Hacker News)
Has your organization seen updates for Microsoft Defender in response to CVE-2026-69414, or are you holding off until a more complete patch is available?
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