CVE-2025-15231
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on Tenda M3 routers via a stack-based buffer overflow in the formSetRemoteVlanInfo function. Attackers can exploit this by manipulating ID/vlan/port parameters in requests to /goform/setVlanInfo. Organizations using Tenda M3 routers with vulnerable firmware are affected.
💻 Affected Systems
- Tenda M3
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, network infiltration, and potential lateral movement to other systems.
Likely Case
Remote code execution allowing attackers to install malware, create backdoors, or disrupt network services.
If Mitigated
Denial of service or device crash if exploit fails to achieve code execution.
🎯 Exploit Status
Public exploit details available on GitHub; remote exploitation without authentication makes this highly dangerous.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.tenda.com.cn/
Restart Required: Yes
Instructions:
1. Check Tenda website for firmware updates. 2. Download latest firmware. 3. Upload via router admin interface. 4. Reboot router.
🔧 Temporary Workarounds
Network Segmentation
allIsolate Tenda M3 routers from untrusted networks and internet exposure.
Access Control Lists
linuxBlock access to /goform/setVlanInfo endpoint at network perimeter.
iptables -A INPUT -p tcp --dport 80 -m string --string "/goform/setVlanInfo" --algo bm -j DROP
🧯 If You Can't Patch
- Replace vulnerable devices with patched or alternative hardware
- Implement strict network segmentation and monitor for exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface; if version is 1.0.0.13(4903), device is vulnerable.Check Version:
Check via router web interface at http://router-ip/ or using telnet/ssh if enabled.Verify Fix Applied:
Verify firmware version has been updated to a version later than 1.0.0.13(4903).📡 Detection & Monitoring
Log Indicators:
- HTTP POST requests to /goform/setVlanInfo with unusual parameter values
- Router crash/reboot logs
Network Indicators:
- Unusual traffic to router port 80 with POST requests containing buffer overflow patterns
SIEM Query:
source="router_logs" AND uri="/goform/setVlanInfo" AND (method="POST" OR params CONTAINS "ID=" OR params CONTAINS "vlan=" OR params CONTAINS "port=")