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9.5CRITICAL

Unpatched 'PhantomRPC' Flaw in Windows Enables Privilege Escalation

📅 27 April 2026 at 15:31 UTC📰 Dark ReadingView original source ↗

A researcher discovered five different exploit paths that stem from an architectural weakness in how Windows' Remote Procedure Call (RPC) mechanism handles connections to unavailable services.

🤖 AI BriefingAuto-generated threat analysis
🔍Threat Overview

A vulnerability in Windows' Remote Procedure Call (RPC) mechanism allows for privilege escalation, potentially enabling attackers to gain elevated access to systems. This architectural weakness can be exploited through multiple different paths.

⚙️Technical Details
Affected Systems
Windows
Attack Vectors
Remote Procedure Call (RPC) mechanism
💥Impact Assessment
Severity: critical
Who Is at Risk
Systems running Windows with unpatched RPC vulnerability
🛡️Recommended Actions
1Apply security patches to Windows immediately
2Monitor systems for signs of privilege escalation attempts
3Implement additional security controls to prevent exploitation
📦Affected Products
Product Family: Windows

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