CVE-2025-12618
📋 TL;DR
A buffer overflow vulnerability in Tenda AC8 routers allows remote attackers to execute arbitrary code by manipulating the 'Time' parameter in the /goform/DatabaseIniSet endpoint. This affects users of Tenda AC8 routers running firmware version 16.03.34.06, potentially leading to full device compromise.
💻 Affected Systems
- Tenda AC8
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete router takeover, enabling attackers to intercept traffic, deploy malware, or pivot to internal networks.
Likely Case
Router compromise resulting in denial of service, credential theft, or unauthorized network access.
If Mitigated
Limited impact if isolated or patched, but still poses risk to device integrity.
🎯 Exploit Status
Exploit details are publicly disclosed, making it easier for attackers to develop and deploy attacks.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.tenda.com.cn/
Restart Required: Yes
Instructions:
Check Tenda's official website for firmware updates. If available, download and apply the patch via the router's web interface, then restart the device.
🔧 Temporary Workarounds
Block Access to Vulnerable Endpoint
linuxUse firewall rules to block external access to the /goform/DatabaseIniSet endpoint on the router.
iptables -A INPUT -p tcp --dport 80 -m string --string '/goform/DatabaseIniSet' --algo bm -j DROP
🧯 If You Can't Patch
- Isolate the router on a separate network segment to limit potential damage.
- Disable remote management features and restrict administrative access to trusted IPs only.
🔍 How to Verify
Check if Vulnerable:
Check the router's firmware version via the web interface or CLI; if it is 16.03.34.06, it is vulnerable.Check Version:
Login to router web interface and navigate to System Status or use telnet/SSH if enabled: 'cat /proc/version' or similar.Verify Fix Applied:
After updating, verify the firmware version has changed from 16.03.34.06 to a patched version.📡 Detection & Monitoring
Log Indicators:
- Unusual requests to /goform/DatabaseIniSet with long 'Time' parameters in router logs.
Network Indicators:
- Suspicious traffic patterns or buffer overflow attempts targeting port 80/443 of the router.
SIEM Query:
source="router_logs" AND uri="/goform/DatabaseIniSet" AND (param="Time" AND length>threshold)