CVE-2025-14878
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on Tenda WH450 routers by exploiting a stack-based buffer overflow in the wirelessRestart HTTP handler. Attackers can take full control of affected devices without authentication. All users running Tenda WH450 firmware version 1.0.0.18 are affected.
💻 Affected Systems
- Tenda WH450
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise leading to persistent backdoor installation, network traffic interception, lateral movement to other devices, and botnet recruitment.
Likely Case
Remote code execution allowing attackers to modify router settings, intercept traffic, or use the device as a pivot point for further attacks.
If Mitigated
Limited impact if devices are behind firewalls with strict inbound filtering, though internal network compromise remains possible.
🎯 Exploit Status
Public proof-of-concept code exists on GitHub, making exploitation trivial for attackers with basic skills.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.tenda.com.cn/
Restart Required: Yes
Instructions:
1. Check Tenda's official website for firmware updates. 2. Download the latest firmware for WH450. 3. Log into router admin interface. 4. Navigate to System Tools > Firmware Upgrade. 5. Upload and install the new firmware. 6. Reboot the router.
🔧 Temporary Workarounds
Block HTTP access to router
linuxPrevent external and internal access to the vulnerable HTTP endpoint
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP
Disable remote management
allTurn off remote administration features in router settings
🧯 If You Can't Patch
- Isolate affected routers in a separate VLAN with strict firewall rules
- Implement network segmentation to limit lateral movement if router is compromised
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via admin interface at System Status > Firmware VersionCheck Version:
curl -s http://router-ip/goform/getStatus | grep versionVerify Fix Applied:
Verify firmware version is no longer 1.0.0.18 after update📡 Detection & Monitoring
Log Indicators:
- HTTP POST requests to /goform/wirelessRestart with unusually long GO parameter
- Router crash/reboot logs
Network Indicators:
- HTTP traffic to router port 80 with POST to /goform/wirelessRestart
- Unusual outbound connections from router
SIEM Query:
source="router_logs" AND uri_path="/goform/wirelessRestart" AND method="POST" AND content_length>100