CVE-2025-15472
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary operating system commands on TRENDnet TEW-811DRU routers by manipulating the DeviceURL parameter in the uapply.cgi file. The attack can be performed without authentication and affects devices running firmware version 1.0.2.0. Anyone using this specific router model with the vulnerable firmware is at risk.
💻 Affected Systems
- TRENDnet TEW-811DRU
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the router allowing attackers to install persistent backdoors, intercept network traffic, pivot to internal networks, or use the device for botnet activities.
Likely Case
Router takeover leading to DNS hijacking, credential theft from network traffic, or deployment of malware to connected devices.
If Mitigated
Limited impact if network segmentation isolates the router and external access is disabled, though local network attacks remain possible.
🎯 Exploit Status
The exploit has been published and weaponized tools are likely available given the low complexity and unauthenticated nature of the attack.
🛠️ 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 strict network controls.
🔧 Temporary Workarounds
Disable Remote Management
allTurn off remote administration features to prevent internet-based attacks
Network Segmentation
allIsolate the router from critical internal networks using VLANs or separate physical networks
🧯 If You Can't Patch
- Replace the vulnerable router with a different model from a vendor that provides security updates
- Implement strict firewall rules to block all inbound traffic to the router's web interface (typically port 80/443)
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via web interface at http://[router-ip]/ or using command: telnet [router-ip] 80 and examine response headersCheck Version:
curl -I http://[router-ip]/ | grep Server or check web interface System Status pageVerify Fix Applied:
Since no patch exists, verification involves confirming workarounds are implemented: check that remote management is disabled and firewall rules block web interface access📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /uapply.cgi with DeviceURL parameter containing shell metacharacters
- Failed authentication attempts followed by successful command execution
Network Indicators:
- Outbound connections from router to suspicious IPs/domains
- Unusual DNS queries from router
- Traffic patterns indicating command-and-control communication
SIEM Query:
source="router.log" AND (uri="/uapply.cgi" AND (param="DeviceURL" AND value MATCHES "[;&|`$()]"))