CVE-2025-25675
📋 TL;DR
This CVE describes a command injection vulnerability in Tenda AC10 routers that allows remote attackers to execute arbitrary commands with root privileges. Attackers can exploit this by sending specially crafted POST requests to the vulnerable formexeCommand function. All users running affected firmware versions are at risk.
💻 Affected Systems
- Tenda AC10
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing attackers to install persistent backdoors, intercept all network traffic, pivot to internal networks, or brick the device.
Likely Case
Attackers gain full control of the router to modify DNS settings, intercept credentials, deploy malware to connected devices, or join botnets.
If Mitigated
With proper network segmentation and access controls, impact limited to the router itself without lateral movement to other systems.
🎯 Exploit Status
Proof of concept available in GitHub repository; exploitation requires simple HTTP POST request with command injection payload.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: No
Instructions:
1. Check Tenda website for firmware updates 2. Download latest firmware for AC10 V1.0 3. Log into router admin interface 4. Navigate to System Tools > Firmware Upgrade 5. Upload and apply new firmware
🔧 Temporary Workarounds
Block External Access to Admin Interface
linuxConfigure firewall to block WAN access to router admin interface (typically port 80/443)
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP
Disable Remote Management
allTurn off remote management feature in router settings
🧯 If You Can't Patch
- Isolate router in separate VLAN with strict firewall rules
- Replace with different router model that receives security updates
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface under System Status or System ToolsCheck Version:
curl -s http://router-ip/goform/getStatus | grep versionVerify Fix Applied:
Verify firmware version is newer than V15.03.06.23 and test with known exploit payloads📡 Detection & Monitoring
Log Indicators:
- POST requests to /goform/execCommand with unusual parameters
- System logs showing unexpected command execution
- Failed authentication attempts to admin interface
Network Indicators:
- Unusual outbound connections from router
- DNS queries to suspicious domains
- Traffic patterns indicating command and control communication
SIEM Query:
source="router.log" AND ("execCommand" OR "cmdinput") AND method="POST"