CVE-2025-56122
📋 TL;DR
This CVE describes an OS command injection vulnerability in Ruijie RG-EW1800GX PRO wireless access points. Attackers can execute arbitrary commands on the device by sending a specially crafted POST request to the vulnerable endpoint. Organizations using affected Ruijie devices are at risk.
💻 Affected Systems
- Ruijie RG-EW1800GX PRO
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full device compromise leading to network pivot, data exfiltration, ransomware deployment, or persistent backdoor installation.
Likely Case
Unauthorized command execution allowing network reconnaissance, credential harvesting, or device configuration changes.
If Mitigated
Limited impact if network segmentation, WAF filtering, and strict access controls prevent exploitation attempts.
🎯 Exploit Status
The GitHub repository contains detailed exploitation information and proof-of-concept code, making this easily weaponizable.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available at this time
Restart Required: No
Instructions:
No official patch available. Monitor Ruijie's security advisories for updates and apply immediately when released.
🔧 Temporary Workarounds
Network Access Restriction
linuxBlock access to the vulnerable endpoint using firewall rules or web application firewall.
iptables -A INPUT -p tcp --dport 80 -m string --string "POST /usr/local/lua/dev_sta/networkConnect.lua" --algo bm -j DROP
iptables -A INPUT -p tcp --dport 443 -m string --string "POST /usr/local/lua/dev_sta/networkConnect.lua" --algo bm -j DROP
Endpoint Isolation
allSegment affected devices to prevent lateral movement if compromised.
🧯 If You Can't Patch
- Isolate affected devices in a dedicated VLAN with strict egress filtering
- Implement network-based intrusion detection to monitor for exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check device firmware version via web interface or SSH: System > Device Information > Firmware VersionCheck Version:
ssh admin@device-ip "cat /etc/version" or check web interface at http://device-ipVerify Fix Applied:
Verify firmware version has been updated beyond B11P226_EW1800GX-PRO_10223117📡 Detection & Monitoring
Log Indicators:
- POST requests to /usr/local/lua/dev_sta/networkConnect.lua with unusual parameters
- System logs showing unexpected command execution or process creation
Network Indicators:
- HTTP POST requests containing shell metacharacters (;, |, &, $, etc.) to the vulnerable endpoint
- Unusual outbound connections from the access point
SIEM Query:
source="ruijie-firewall" AND (url="/usr/local/lua/dev_sta/networkConnect.lua" AND method="POST")