CVE-2022-25455
📋 TL;DR
This vulnerability is a stack overflow in Tenda AC6 routers that allows remote attackers to execute arbitrary code by sending a specially crafted request to the SetIpMacBind function. It affects Tenda AC6 routers running firmware version 15.03.05.09_multi. Attackers can potentially gain full control of affected devices.
💻 Affected Systems
- Tenda AC6
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, allowing attackers to intercept network traffic, install malware, pivot to internal networks, or create persistent backdoors.
Likely Case
Remote code execution resulting in device takeover, enabling attackers to modify router settings, intercept traffic, or use the device as part of a botnet.
If Mitigated
Limited impact if device is behind firewall with restricted WAN access and proper network segmentation is implemented.
🎯 Exploit Status
Public proof-of-concept code exists in GitHub repositories. The vulnerability requires no authentication and has a simple exploitation path.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: Yes
Instructions:
1. Check Tenda website for firmware updates
2. Download latest firmware for AC6 model
3. Access router admin interface
4. Navigate to firmware upgrade section
5. Upload and install new firmware
6. Reboot router after installation
🔧 Temporary Workarounds
Disable remote management
allPrevent external access to router administration interface
Access router admin panel -> Advanced Settings -> Remote Management -> Disable
Network segmentation
allIsolate router management interface to separate VLAN
🧯 If You Can't Patch
- Replace affected router with different model or vendor
- Place router behind dedicated firewall with strict inbound rules
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface under System Status or About pageCheck Version:
Check via web interface or SSH if enabled: cat /proc/versionVerify Fix Applied:
Verify firmware version is no longer 15.03.05.09_multi after update📡 Detection & Monitoring
Log Indicators:
- Unusual requests to SetIpMacBind endpoint
- Large payloads in HTTP POST requests to router management interface
- Multiple failed login attempts followed by exploitation attempts
Network Indicators:
- Unusual outbound connections from router
- Traffic patterns indicating command and control communication
- Port scans targeting router management ports
SIEM Query:
source="router_logs" AND (uri="/goform/SetIpMacBind" OR method="POST" AND size>1000)