CVE-2025-10443
📋 TL;DR
A buffer overflow vulnerability in Tenda AC9 and AC15 routers allows remote attackers to execute arbitrary code by sending specially crafted requests to the /goform/exeCommand endpoint. This affects devices running specific firmware versions and can lead to complete system compromise. Attackers can exploit this without authentication from the network.
💻 Affected Systems
- Tenda AC9
- Tenda AC15
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to full router compromise, credential theft, network pivoting, and persistent backdoor installation.
Likely Case
Router takeover enabling traffic interception, DNS hijacking, and lateral movement into connected networks.
If Mitigated
Limited impact if routers are behind firewalls with restricted WAN access and network segmentation.
🎯 Exploit Status
Public proof-of-concept available on GitHub. Exploitation requires sending crafted HTTP POST request to vulnerable endpoint.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None found
Restart Required: Yes
Instructions:
1. Check Tenda website for firmware updates. 2. Download latest firmware for your model. 3. Access router admin panel. 4. Navigate to System Tools > Firmware Upgrade. 5. Upload and install new firmware. 6. Reboot router.
🔧 Temporary Workarounds
Disable Remote Management
allPrevent WAN access to router management interface
Network Segmentation
allIsolate routers on separate VLAN with restricted access
🧯 If You Can't Patch
- Block external access to router management ports (typically 80/443) at firewall
- Implement strict network access controls to limit who can reach router management interface
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin panel under System Status or similar sectionCheck Version:
curl -s http://router-ip/ | grep -i firmware or check web interfaceVerify Fix Applied:
Verify firmware version is newer than affected versions and test if /goform/exeCommand endpoint responds to crafted payloads📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /goform/exeCommand
- Large payloads in HTTP requests
- Multiple failed authentication attempts
Network Indicators:
- HTTP POST requests to /goform/exeCommand with unusual parameters
- Traffic from unexpected sources to router management ports
SIEM Query:
source="router_logs" AND (uri="/goform/exeCommand" OR cmdinput=*)