CVE-2025-29149
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on Tenda i12 routers by exploiting a buffer overflow in the ping1 parameter of the formSetAutoPing function. Attackers can potentially take full control of affected devices. This affects users running Tenda i12 routers with firmware version V1.0.0.10(3805).
💻 Affected Systems
- Tenda i12
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, allowing attackers to intercept traffic, pivot to internal networks, or create persistent backdoors.
Likely Case
Router crash/reboot causing denial of service, or limited code execution to modify router settings.
If Mitigated
No impact if device is not internet-facing and network segmentation prevents access to router management interface.
🎯 Exploit Status
The vulnerability requires sending crafted requests to the router's web interface. While no public exploit exists, the technical details are documented in GitHub repositories.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Tenda website for firmware updates beyond V1.0.0.10(3805)
Vendor Advisory: Not available - check Tenda support site
Restart Required: Yes
Instructions:
1. Log into Tenda router web interface. 2. Navigate to System Tools > Firmware Upgrade. 3. Download latest firmware from Tenda website. 4. Upload and install firmware update. 5. Reboot router after installation.
🔧 Temporary Workarounds
Disable remote management
allPrevent external access to router web interface
Network segmentation
allIsolate router management interface to trusted network segments only
🧯 If You Can't Patch
- Replace affected router with updated model or different vendor
- Implement strict firewall rules to block all external access to router management interface (ports 80/443)
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in web interface under System Status or System ToolsCheck Version:
Not applicable - check via web interface or router admin panelVerify Fix Applied:
Verify firmware version is updated beyond V1.0.0.10(3805) and test auto-ping functionality📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /goform/setAutoPing
- Multiple failed ping configuration attempts
- Router crash/reboot logs
Network Indicators:
- Unusual traffic to router management interface from external sources
- Multiple malformed HTTP requests to router IP
SIEM Query:
source="router_logs" AND (uri="/goform/setAutoPing" OR message="ping1" OR "formSetAutoPing")