Microsoft Confirms RoguePlanet Zero-Day Vulnerability
Microsoft has confirmed a zero-day vulnerability in its Defender's Malware Protection Engine, known as RoguePlanet (CVE-2026-50656), which grants attackers SYSTEM privileges on fully patched Windows 10 and 11. The company is working on a patch, but a security researcher, Chaotic Eclipse, has disclosed seven such exploits in recent months, sparking a feud with Microsoft.
Key points
- Microsoft has confirmed a zero-day vulnerability in its Defender's Malware Protection Engine, known as RoguePlanet (CVE-2026-50656).
- The vulnerability, a race-condition flaw, grants attackers SYSTEM privileges on fully patched Windows 10 and 11.
- Chaotic Eclipse, a security researcher, disclosed the vulnerability and has accused Microsoft of being disrespectful and poorly handling vulnerability disclosures.
- This is the seventh zero-day exploit disclosed by Chaotic Eclipse in recent months, sparking a feud with Microsoft.
- Microsoft is working on a patch for the vulnerability and will provide information in a security advisory when the update is available.
Microsoft has confirmed a zero-day vulnerability in its Defender's Malware Protection Engine, known as RoguePlanet (CVE-2026-50656). The vulnerability, a race-condition flaw, grants attackers SYSTEM privileges on fully patched Windows 10 and 11.
Chaotic Eclipse, a security researcher, disclosed the vulnerability and has accused Microsoft of being disrespectful and poorly handling vulnerability disclosures. This is the seventh zero-day exploit disclosed by Chaotic Eclipse in recent months, sparking a feud with Microsoft.
Microsoft is working on a patch for the vulnerability and will provide information in a security advisory when the update is available. The company has not commented on the feud with Chaotic Eclipse, but the incident highlights the ongoing cat-and-mouse game between security researchers and software vendors.
Sources
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