CVE-2025-15471
📋 TL;DR
This CVE describes a remote command injection vulnerability in TRENDnet TEW-713RE routers. Attackers can execute arbitrary operating system commands by manipulating the SZCMD parameter in the /goformX/formFSrvX endpoint. All users of affected TRENDnet TEW-713RE routers with firmware version 1.02 are vulnerable to this attack.
💻 Affected Systems
- TRENDnet TEW-713RE
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the router allowing attackers to establish persistent access, intercept network traffic, pivot to internal networks, and potentially brick the device.
Likely Case
Attackers gain remote shell access to execute commands on the router, potentially modifying configurations, stealing credentials, or launching attacks against internal devices.
If Mitigated
With proper network segmentation and access controls, impact is limited to the router itself without allowing lateral movement to other systems.
🎯 Exploit Status
The exploit is publicly documented and requires minimal technical skill to execute. No authentication is required for exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch is available. The vendor did not respond to disclosure attempts. Consider replacing the device or implementing workarounds.
🔧 Temporary Workarounds
Block Access to Vulnerable Endpoint
linuxUse firewall rules to block access to the /goformX/formFSrvX endpoint
iptables -A INPUT -p tcp --dport 80 -m string --string "/goformX/formFSrvX" --algo bm -j DROP
iptables -A INPUT -p tcp --dport 443 -m string --string "/goformX/formFSrvX" --algo bm -j DROP
Disable Remote Administration
allTurn off remote administration features in router settings
🧯 If You Can't Patch
- Isolate the router in a dedicated network segment with strict firewall rules
- Implement network monitoring to detect exploitation attempts and unusual outbound connections
🔍 How to Verify
Check if Vulnerable:
Check router web interface for firmware version. If version is 1.02, the device is vulnerable. Alternatively, test with a harmless command injection payload: curl 'http://[router-ip]/goformX/formFSrvX?SZCMD=echo%20test'Check Version:
Check router web interface at http://[router-ip]/ or login and navigate to firmware/status pageVerify Fix Applied:
No official fix exists to verify. Verify workarounds by testing that the vulnerable endpoint no longer responds or that command injection attempts fail.📡 Detection & Monitoring
Log Indicators:
- Unusual POST/GET requests to /goformX/formFSrvX with command-like parameters
- Router logs showing unexpected command execution or configuration changes
Network Indicators:
- HTTP requests containing shell metacharacters (;, |, &, $, etc.) in URL parameters
- Unusual outbound connections from router to external IPs
SIEM Query:
source="router_logs" AND (url="/goformX/formFSrvX" AND (param="SZCMD" AND value CONTAINS ";" OR value CONTAINS "|" OR value CONTAINS "&"))