CVE-2025-14535
📋 TL;DR
This is a critical buffer overflow vulnerability in UTT 进取 512W routers that allows remote attackers to execute arbitrary code by exploiting the strcpy function in the formConfigFastDirectionW component. Attackers can compromise affected devices without authentication, potentially gaining full control. All users of UTT 进取 512W routers up to version 3.1.7.7-171114 are affected.
💻 Affected Systems
- UTT 进取 512W
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing remote code execution, device takeover, lateral movement to internal networks, and persistent backdoor installation.
Likely Case
Remote code execution leading to device compromise, credential theft, network reconnaissance, and potential botnet recruitment.
If Mitigated
Limited impact if devices are behind firewalls with strict inbound filtering and network segmentation.
🎯 Exploit Status
Exploit details are publicly available on GitHub. The vulnerability is straightforward to exploit due to classic buffer overflow in strcpy function.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available - vendor did not respond to disclosure
Restart Required: Yes
Instructions:
No official patch available. Consider replacing affected devices with supported alternatives or implementing strict network controls.
🔧 Temporary Workarounds
Network Access Control
linuxBlock external access to router web interface and restrict internal access to trusted networks only.
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP
Disable Vulnerable Feature
allIf possible, disable the formConfigFastDirectionW functionality in router configuration.
🧯 If You Can't Patch
- Isolate affected routers in dedicated VLAN with strict firewall rules preventing all inbound traffic
- Implement network monitoring and intrusion detection specifically for buffer overflow attempts against these devices
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via web interface at System Status or About page. If version is 3.1.7.7-171114 or earlier, device is vulnerable.Check Version:
Check via web interface or SSH if enabled: cat /proc/version or show version in CLIVerify Fix Applied:
No fix available to verify. Consider verifying workarounds by testing network connectivity restrictions.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /goform/formConfigFastDirectionW
- Large payloads in ssid parameter
- System crash or restart logs
Network Indicators:
- Unusual traffic patterns to router management interface
- Buffer overflow exploit patterns in network traffic
SIEM Query:
source="router_logs" AND uri="/goform/formConfigFastDirectionW" AND (payload_size>100 OR contains(ssid, "AAAAAAAA"))