CVE-2022-22715
📋 TL;DR
CVE-2022-22715 is a Windows Named Pipe File System elevation of privilege vulnerability that allows authenticated attackers to gain SYSTEM-level privileges on affected systems. This affects Windows operating systems where an attacker with standard user privileges can exploit improper handling of named pipes to execute code with elevated permissions. The vulnerability requires the attacker to have initial access to the target system.
💻 Affected Systems
- Microsoft Windows
📦 What is this software?
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 11 by Microsoft
Windows 11 by Microsoft
Windows Server by Microsoft
Windows Server by Microsoft
Windows Server by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with SYSTEM privileges, enabling installation of persistent malware, credential theft, lateral movement, and data exfiltration.
Likely Case
Privilege escalation from standard user to SYSTEM, allowing attackers to bypass security controls, disable security software, and establish persistence.
If Mitigated
Limited impact if proper privilege separation, application control, and monitoring are in place; attackers may still gain elevated privileges but face detection.
🎯 Exploit Status
Exploit requires authenticated user access; privilege escalation path is straightforward once initial access is obtained.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: March 2022 security updates (KB5011493 for Windows 10, KB5011495 for Windows 11, KB5011551 for Server 2019, KB5011552 for Server 2022)
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-22715
Restart Required: Yes
Instructions:
1. Apply March 2022 Windows security updates via Windows Update. 2. For enterprise environments, deploy updates through WSUS or SCCM. 3. Restart systems after patch installation.
🔧 Temporary Workarounds
Restrict Named Pipe Access
windowsConfigure Windows security policies to restrict named pipe creation and access to trusted applications only.
Use Group Policy: Computer Configuration > Windows Settings > Security Settings > File System > Add named pipe restrictions
Implement Least Privilege
windowsEnsure users operate with minimal necessary privileges to reduce impact if exploited.
🧯 If You Can't Patch
- Implement application control policies to prevent unauthorized named pipe creation
- Monitor for suspicious named pipe activity and privilege escalation attempts
🔍 How to Verify
Check if Vulnerable:
Check Windows version and patch level: systeminfo | findstr /B /C:"OS Name" /C:"OS Version" and verify March 2022 updates are not installed.Check Version:
systeminfo | findstr /B /C:"OS Name" /C:"OS Version"Verify Fix Applied:
Verify March 2022 security updates are installed via: wmic qfe list | findstr "5011493 5011495 5011551 5011552"📡 Detection & Monitoring
Log Indicators:
- Event ID 4688: New process creation with SYSTEM privileges from non-privileged user
- Event ID 5145: Network share object access with named pipe creation
- Unexpected named pipe creation in \Device\NamedPipe\
Network Indicators:
- Lateral movement attempts following privilege escalation
- Unexpected SYSTEM-level network connections from user workstations
SIEM Query:
source="windows" (event_id=4688 AND new_process_name="*" AND subject_user_name!="SYSTEM" AND token_elevation_type="%%1938") OR (event_id=5145 AND relative_target_name="*\Device\NamedPipe\*")