---
id: 6556
title: "CVE-2026-50656 PoC: Microsoft Defender RoguePlanet elevation-of-privilege patch bypass"
cve: CVE-2026-50656
cvss: 7.8
severity: high
vendor: "Microsoft"
product: "Microsoft Malware Protection Engine / Microsoft Defender"
affected_versions: "Microsoft Malware Protection Engine versions before 1.1.26060.3008; repository reports Windows 11 25H2 Canary and Windows Server 2025 testing, with Windows 10 vulnerable but unsupported by this PoC"
source_domain: github.com
source_url: "https://github.com/MSNightmare/ShieldBreak"
published_at: "2026-08-11T19:35:37Z"
tags: ["zero-day", "public-poc", "privilege-escalation", "windows-security", "windows", "defender", "patch-bypass", "cwe-59", "poc", "microsoft-defender", "cve-2026-50656"]
phying_url: "https://phying.com/item/6556"
lang: en
---

# CVE-2026-50656 PoC: Microsoft Defender RoguePlanet elevation-of-privilege patch bypass

## Summary

ShieldBreak, a public PoC for CVE-2026-50656, claims a full bypass of Microsoft's RoguePlanet patch—an elevation-of-privilege flaw in the Malware Protection Engine—on Windows 11 25H2 and Server 2025.

## Why it matters

The repository publishes a patch-bypass implementation for a Defender elevation-of-privilege flaw, increasing practical risk to affected endpoints. Administrators should update the Malware Protection Engine to a fixed version and validate the PoC only in an explicitly authorized isolated environment; public availability does not by itself confirm exploitation in the wild.

## Intelligence Metadata

- **Sources:** github.com
- **CVE:** CVE-2026-50656
- **CVSS:** 7.8
- **Vendor:** Microsoft
- **Product:** Microsoft Malware Protection Engine / Microsoft Defender
- **Affected versions:** Microsoft Malware Protection Engine versions before 1.1.26060.3008; repository reports Windows 11 25H2 Canary and Windows Server 2025 testing, with Windows 10 vulnerable but unsupported by this PoC
- **Published:** 2026-08-11T19:35:37Z
- **Original:** https://github.com/MSNightmare/ShieldBreak
- **Phying News:** https://phying.com/item/6556