VulnerabilityBleeping Computer
7.8 — HIGH
Microsoft working on Defender patch for RoguePlanet zero-day
Microsoft confirmed that it's working on a security patch for a Defender zero-day vulnerability named "RoguePlanet," disclosed one week ago. [...]
🤖 AI BriefingAuto-generated threat analysis
🔍Threat Overview
A zero-day vulnerability in Microsoft Defender, tracked as CVE-2026-50656, allows attackers to spawn command prompts with SYSTEM privileges via a race condition, affecting fully patched Windows 10 and Windows 11 devices.
⚙️Technical Details
Affected Systems
Windows 10Windows 11
Attack Vectors
LOCAL
💥Impact Assessment
Severity: High
Who Is at Risk
Fully patched Windows 10 and Windows 11 devices
🛡️Recommended Actions
1Apply the Microsoft Defender patch as soon as available
2Monitor system logs for suspicious activity related to command prompts with SYSTEM privileges
3Implement additional security measures, such as behavioral monitoring and anomaly detection
📦Affected Products
Microsoft Defender
🔐NVD Verified DataVERIFIED
CVE-2026-50656 ↗CVSS 7.8 — HIGH
Attack Vector
LOCAL
Complexity
LOW
Vector String
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HWeaknesses
CWE-59
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