CVE-2026-50656
HIGHMicrosoft is aware of an elevation of privilege in the Microsoft Malware Protection Engine in Microsoft Defender publicly referred to as "RoguePlanet ".
CVSS v3.1 Score
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HRelated Intelligence (11)
CVE-2026-69414 ShieldBreak Zero-Day: No Patch, and CISA BOD 26-04 Gives You 14 Days
Executive Summary ShieldBreak (CVE-2026-69414) is a zero-day elevation-of-privilege vulnerability in the Microsoft Malware Protection Engine used by Microsoft Defender, allowing a low-privilege local attacker to escalate to SYSTEM. A public PoC was released on August 12, 2026, and Microsoft assigned the CVE on August 14, and no patch is available yet. Qualys VMDR provides detection […]
Researcher bypasses Microsoft Defender security patch, seizing control
Just weeks after Microsoft patched a critical hole in Microsoft Defender, a cybersecurity researcher has posted an apparent bypass that provides system-level control to attackers once they gain any level of access. The researcher, who goes by the name Nightmare Eclipse, has been engaged in a long-running battle with Microsoft Security . Nightmare Eclipse has not provided the further details we req
Researcher creates workaround for Microsoft Defender security patch
Just weeks after Microsoft patched a critical hole in Microsoft Defender, a cybersecurity researcher has posted an apparent workaround that provides system-level control to attackers once they gain any level of access. The researcher, who goes by the name Nightmare Eclipse, has been engaged in a long-running battle with Microsoft Security . As of publication time, neither Microsoft nor Nightmare E
ShieldBreak Zero-Day PoC Claims Microsoft Defender Patch Bypass With SYSTEM Access
The security researcher going by the name Chaotic Eclipse (aka INFINITE NIGHTMARE, MSNightmare, and Nightmare-Eclipse) has released a proof-of-concept (PoC) for a new Microsoft zero-day called ShieldBreak. The vulnerability, rooted in Microsoft Defender for Windows, demonstrates a patch bypass for CVE-2026-50656 (CVSS score: 7.8), otherwise known as RoguePlanet. RoguePlanet has been described
Patch Tuesday - August 2026
Microsoft is publishing 421 vulnerabilities on August 2026 Patch Tuesday , including 236 vulnerabilities in Windows. This is lower volume than last month’s record-breaking behemoth, but still one of the largest Patch Tuesday totals ever. There is no reason to suppose that Patch Tuesday will ever return to the lower volumes we saw prior to 2026. Microsoft is aware of exploitation in the wild for on
Patch Tuesday - July 2026
Microsoft is publishing 622 vulnerabilities on July 2026 Patch Tuesday , including a record-breaking 416 Windows vulnerabilities. Microsoft is aware of exploitation in the wild for two of the vulnerabilities published today, both of which are listed on CISA KEV, as well as public disclosure for one other. As usual, browser vulns are not included in the Patch Tuesday count above. Rapid7 noted last
Microsoft Fix for Defender Zero-Day Draws Fresh Criticism
<img src="https://ismg-cdn.nyc3.cdn.digitaloceanspaces.com/articles/microsoft-fix-for-defender-zero-day-draws-fresh-criticism-image_small-3-a-32199.jpg" align=right hspace=4><b>NightmareEclipse Says Mitigation Can Exhaust Disk Space, Crash Apps</b><br>Microsoft's patch for CVE-2026-50656, known as RoguePlanet, has sparked fresh criticism after researcher NightmareEclipse alleged the mitigation can
Microsoft Patches Defender ‘RoguePlanet’ Vulnerability
The privilege escalation vulnerability tracked as CVE-2026-50656 has been patched with a Microsoft Malware Protection Engine update. The post Microsoft Patches Defender ‘RoguePlanet’ Vulnerability appeared first on SecurityWeek .
Microsoft Patches RoguePlanet Defender Flaw That Can Grant SYSTEM Privileges
Microsoft has released security updates for a Defender vulnerability known as RoguePlanet, nearly a month after details of the flaw became public. The vulnerability, tracked as CVE-2026-50656 (CVSS score: 7.8), is a privilege escalation issue in the Microsoft Malware Protection Engine ("mpengine.dll"), which provides scanning, detection, and cleaning capabilities for its antivirus and
Microsoft Confirms RoguePlanet Defender Zero-Day, Says Patch is in Development
Microsoft has formally disclosed that it's working to release a patch to address a Defender zero-day codenamed RoguePlanet. The vulnerability has now been assigned the CVE identifier CVE-2026-50656 (CVSS score: 7.8), with the tech giant describing it as a privilege escalation flaw. "Microsoft is aware of an elevation of privilege in the Microsoft Malware Protection Engine in Microsoft Defender
NVD HIGH: CVE-2026-50656 — Microsoft is aware of an elevation of privilege in the Microsoft Malware Protect...
Microsoft is aware of an elevation of privilege in the Microsoft Malware Protection Engine in Microsoft Defender publicly referred to as "RoguePlanet ". We are working to provide a high quality security update that addresses this vulnerability. We will provide information in this CVE when the update is available.