CVE-2026-3698
📋 TL;DR
A buffer overflow vulnerability in the UTT HiPER 810G router's NTP configuration function allows remote attackers to execute arbitrary code or crash the device. This affects all versions up to 1.7.7-171114. Attackers can exploit this without authentication to potentially take full control of affected routers.
💻 Affected Systems
- UTT HiPER 810G
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, network infiltration, data theft, and persistent backdoor installation
Likely Case
Device crash causing service disruption, or limited code execution for network reconnaissance and lateral movement
If Mitigated
Denial of service if exploit fails or is blocked by network controls
🎯 Exploit Status
Public exploit code exists on GitHub, making exploitation trivial for attackers with basic skills
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: Yes
Instructions:
1. Check vendor website for firmware updates
2. If update available, download and verify checksum
3. Backup current configuration
4. Upload new firmware via web interface
5. Reboot router
6. Restore configuration if needed
🔧 Temporary Workarounds
Disable NTP functionality
allTurn off NTP service to remove attack vector
Login to router web interface
Navigate to System > Time Settings
Disable NTP synchronization
Set time manually
Network segmentation and firewall rules
linuxRestrict access to router management interface
iptables -A INPUT -p tcp --dport 80 -s trusted_network -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
🧯 If You Can't Patch
- Isolate vulnerable routers in separate VLAN with strict firewall rules
- Implement network monitoring and intrusion detection for exploit attempts
🔍 How to Verify
Check if Vulnerable:
Check firmware version in router web interface under System > Firmware UpgradeCheck Version:
curl -s http://router-ip/goform/getStatus | grep versionVerify Fix Applied:
Verify firmware version is newer than 1.7.7-171114📡 Detection & Monitoring
Log Indicators:
- Multiple failed NTP configuration attempts
- Unusual POST requests to /goform/NTP
- Router crash/reboot logs
Network Indicators:
- Unusual traffic to router port 80 with long NTP parameter strings
- Exploit pattern matching in packet captures
SIEM Query:
source="router_logs" AND (url="/goform/NTP" AND data_length>1000)