CVE-2025-25453
📋 TL;DR
This vulnerability allows attackers to cause a buffer overflow in Tenda AC10 routers via the AdvSetMacMtuWan function's serviceName2 parameter. Successful exploitation could lead to denial of service or potentially remote code execution. Only users of Tenda AC10 V4.0si_V16.03.10.20 firmware are affected.
💻 Affected Systems
- Tenda AC10
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution allowing full router compromise, credential theft, and network pivoting
Likely Case
Router crash and denial of service requiring physical reset
If Mitigated
Limited impact if network segmentation isolates routers and monitoring detects exploitation attempts
🎯 Exploit Status
Exploit requires authentication to the router's web interface; public proof-of-concept demonstrates buffer overflow but not full RCE
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None known
Restart Required: Yes
Instructions:
1. Check Tenda's official website for firmware updates
2. If update available, download and flash via router web interface
3. Factory reset after update to ensure clean configuration
🔧 Temporary Workarounds
Disable remote management
allPrevent external access to router web interface
Change default credentials
allUse strong, unique passwords for router administration
🧯 If You Can't Patch
- Segment router management interface to internal network only
- Implement network monitoring for buffer overflow attempts
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in web interface under System Status or similar sectionCheck Version:
No CLI command; check via router web interface at 192.168.0.1 or similarVerify Fix Applied:
Verify firmware version has changed from V16.03.10.20 to a newer version📡 Detection & Monitoring
Log Indicators:
- Router crash/reboot logs
- Unusual POST requests to AdvSetMacMtuWan endpoint
Network Indicators:
- Unusual traffic patterns to router management interface
- Router becoming unresponsive
SIEM Query:
source="router_logs" AND ("crash" OR "reboot" OR "AdvSetMacMtuWan")