CVE-2025-68706
📋 TL;DR
A stack-based buffer overflow vulnerability in KuWFi 4G LTE AC900 devices allows attackers to crash the web server or potentially execute arbitrary code by sending specially crafted requests to the /goform/formMultiApnSetting endpoint. This affects devices running GoAhead-Webs HTTP daemon with firmware version 1.0.13. The vulnerability is remotely exploitable without authentication.
💻 Affected Systems
- KuWFi 4G LTE AC900 wireless router
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, data theft, and use as a pivot point into internal networks.
Likely Case
Web server crash causing denial of service and potential device reboot, disrupting network connectivity.
If Mitigated
Limited impact if device is behind firewall with restricted web interface access.
🎯 Exploit Status
Exploitation requires sending a specially crafted HTTP POST request to the vulnerable endpoint.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
1. Check vendor website for firmware updates
2. If update available, download and install via web interface
3. Reboot device after installation
🔧 Temporary Workarounds
Disable web interface
allDisable the HTTP daemon if not required for operation
Network segmentation
allPlace affected devices in isolated network segments
🧯 If You Can't Patch
- Implement strict firewall rules to block external access to port 80/443 on affected devices
- Use network intrusion detection systems to monitor for exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check firmware version in device web interface or via SSH if available. Version 1.0.13 is vulnerable.Check Version:
Check web interface admin panel or use curl to query device statusVerify Fix Applied:
Verify firmware version has been updated to a version later than 1.0.13📡 Detection & Monitoring
Log Indicators:
- HTTP POST requests to /goform/formMultiApnSetting with long pincode parameter
- Web server crash/restart logs
Network Indicators:
- HTTP POST requests with unusually long pincode parameter values (>132 bytes)
SIEM Query:
http.method:POST AND http.uri:"/goform/formMultiApnSetting" AND http.param.pincode.length > 132🔗 References
- https://drive.proton.me/urls/HJCJYAC7JM#XtHcm3P7QaYk
- https://github.com/actuator/cve/blob/main/Kuwfi/CVE-2025-68706.txt
- https://github.com/actuator/cve/tree/main/Kuwfi
- https://kuwfi.com/products/kuwfi-gigabit-wireless-router-4g-lte-wifi-router-dual-band-portable-wifi-modem-hotspot-64-user-with-gigabit-wan-lan-rj11-port
