CVE-2025-10432
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on Tenda AC1206 routers via a stack-based buffer overflow in the HTTP request handler. Attackers can exploit this by sending specially crafted requests to manipulate the wanMTU parameter. All users running the affected firmware version are at risk.
💻 Affected Systems
- Tenda AC1206
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete router compromise, credential theft, network traffic interception, and lateral movement into connected devices.
Likely Case
Router takeover enabling attackers to modify DNS settings, intercept traffic, or deploy malware to connected devices.
If Mitigated
Limited impact if routers are behind firewalls with strict inbound filtering, though internal exploitation remains possible.
🎯 Exploit Status
Public proof-of-concept code exists, making exploitation straightforward for attackers with basic skills.
🛠️ 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 for AC1206
3. Log into router admin interface
4. Navigate to firmware upgrade section
5. Upload and apply new firmware
6. Reboot router after update completes
🔧 Temporary Workarounds
Disable remote management
allDisable web management interface access from WAN/Internet
Network segmentation
allIsolate router management interface to separate VLAN
🧯 If You Can't Patch
- Replace affected routers with different models that receive security updates
- Implement strict firewall rules blocking all inbound traffic to router management interface
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via admin interface. If version is 15.03.06.23, device is vulnerable.Check Version:
Login to router web interface and check System Status or Firmware Version pageVerify Fix Applied:
After firmware update, verify version has changed from 15.03.06.23 to a newer version.📡 Detection & Monitoring
Log Indicators:
- HTTP POST requests to /goform/AdvSetMacMtuWa with unusual wanMTU parameter values
- Router crash/reboot logs
Network Indicators:
- Unusual HTTP traffic to router management port (typically 80/443)
- Exploit pattern matching known PoC signatures
SIEM Query:
source="router_logs" AND (uri="/goform/AdvSetMacMtuWa" OR uri="*AdvSetMacMtuWa*") AND (param="wanMTU" OR param="*MTU*")