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  • Three Microsoft Defender Zero-Days Actively Exploited; Two Still Unpatched  – The Hacker News
AttackFeed by Joe Wagner | Three Microsoft Defender Zero-Days Actively Exploited; Two Still Unpatched  - The Hacker News

Three Microsoft Defender Zero-Days Actively Exploited; Two Still Unpatched  – The Hacker News

Posted on April 17, 2026 By [email protected] (The Hacker News) No Comments on Three Microsoft Defender Zero-Days Actively Exploited; Two Still Unpatched  – The Hacker News
Attack Feeds

Huntress is warning that threat actors are exploiting three recently disclosed security flaws in Microsoft Defender to gain elevated privileges in compromised systems.
The activity involves the exploitation of three vulnerabilities that are codenamed BlueHammer (requires GitHub sign-in), RedSun, and UnDefend, all of which were released as zero-days by a researcher known as Chaotic Eclipse (  –

Read More  – The Hacker News 

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