Elevation of Privilege in Microsoft Defender by Microsoft
CVE-2026-50656

7.8HIGH

Key Information:

Vendor

Microsoft
Status
Microsoft Malware Protection Engine
Vendor
CVE Published:
16 June 2026

Badges

📈 Score: 1,050💰 Ransomware👾 Exploit Exists🟡 Public PoC📰 News Worthy

What is CVE-2026-50656?

CVE-2026-50656 is a significant vulnerability identified within the Microsoft Malware Protection Engine, a crucial component of the Microsoft Defender security suite designed to protect systems from various forms of malware and cyber threats. This vulnerability constitutes an elevation of privilege, which may allow an attacker to gain unauthorized access to system resources or escalate their user permissions without proper authorization. If exploited, this can severely weaken an organization's security posture, allowing malicious actors to execute arbitrary code, compromise sensitive data, or manipulate system operations, potentially leading to widespread impact across affected installations.

Potential impact of CVE-2026-50656

  1. Unauthorized Access: This vulnerability could enable attackers to gain higher privileges on the system, overriding existing security measures and allowing them to access sensitive system files and data that would typically be protected.

  2. Malware Deployment: By elevating their privileges, adversaries could deploy additional malware or ransomware, further compromising the integrity of the systems and potentially leading to significant data loss or theft.

  3. Operational Disruption: The exploitation of this vulnerability could result in service outages or system malfunctions, impacting an organization's operations and service delivery, and leading to potential financial losses and reputational damage.

Affected Version(s)

Microsoft Malware Protection Engine 1.1.0.0 < 1.1.26060.3008

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-50656
Created by 0xBlackash

News Articles

favicon imagetheregister

Microsoft closes book on Nightmare Eclipse's RoguePlanet zero-day

Weeks after the exploit code dropped, Redmond has finally ships a fix for the Defender zero-day

3 hours ago

favicon imageThe Hacker News

Microsoft Patches RoguePlanet Defender Flaw That Can Grant SYSTEM Privileges

Microsoft Patches RoguePlanet Defender Flaw That Can Grant SYSTEM Privileges | Read more hacking news on The Hacker News cybersecurity news website and learn how to protect against cyberattacks and software vulnerabilities.

8 hours ago

favicon imageBleepingComputer

Microsoft patches RoguePlanet Defender zero-day vulnerability

Microsoft has released a security patch to address a Defender zero-day vulnerability known as

11 hours ago

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • 💰

    Used in Ransomware

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • 📰

    First article discovered by Onmsft

  • Vulnerability published

  • Vulnerability Reserved

.