CVE-2025-25454
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on Tenda AC10 routers via a buffer overflow in the AdvSetMacMtuWan function. Attackers can exploit this by sending specially crafted requests to the wanSpeed2 parameter. All users running the vulnerable firmware version are affected.
💻 Affected Systems
- Tenda AC10
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete router compromise, allowing attackers to intercept traffic, modify configurations, or use the router as a pivot point into internal networks.
Likely Case
Router crash/reboot causing denial of service, potentially followed by remote code execution if exploit is refined.
If Mitigated
Limited to denial of service if exploit attempts are blocked at network perimeter or if router has additional security controls.
🎯 Exploit Status
Public proof-of-concept code exists on GitHub, making exploitation straightforward for attackers with basic skills.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not found in provided references
Restart Required: Yes
Instructions:
1. Check Tenda's official website for firmware updates. 2. Download latest firmware for AC10. 3. Access router admin interface. 4. Navigate to firmware upgrade section. 5. Upload and apply new firmware. 6. Reboot router.
🔧 Temporary Workarounds
Disable remote management
allPrevent external access to router administration interface
Network segmentation
allIsolate router management interface to trusted network segments only
🧯 If You Can't Patch
- Replace affected routers with different models or brands
- Implement strict network access controls to limit exposure to router management interfaces
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface. If version is V4.0si_V16.03.10.20, device is vulnerable.Check Version:
Check via router web interface or SSH if enabled: cat /proc/version or show version commandsVerify Fix Applied:
Verify firmware version has been updated to a version later than V4.0si_V16.03.10.20📡 Detection & Monitoring
Log Indicators:
- Multiple failed requests to router management interface
- Unusual traffic patterns to router on management ports
- Router crash/reboot logs
Network Indicators:
- Unusual HTTP POST requests to router containing long strings in wanSpeed2 parameter
- Traffic to router on non-standard ports
SIEM Query:
source_ip="router_ip" AND (http_uri CONTAINS "AdvSetMacMtuWan" OR http_post_data CONTAINS "wanSpeed2")