CVE-2025-25610
📋 TL;DR
This CVE describes a buffer overflow vulnerability in TOTOlink A3002R routers that allows attackers to execute arbitrary code by sending specially crafted requests to the formIpv6Setup interface. The vulnerability affects users running vulnerable firmware versions on these specific router models. Successful exploitation could lead to complete device compromise.
💻 Affected Systems
- TOTOlink A3002R
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to full router compromise, credential theft, network traffic interception, and lateral movement into connected networks.
Likely Case
Router compromise allowing attackers to modify network settings, intercept traffic, or use the device as a pivot point for further attacks.
If Mitigated
Denial of service or limited information disclosure if exploit attempts are detected and blocked.
🎯 Exploit Status
Exploitation requires sending crafted HTTP requests to the vulnerable interface. The GitHub reference shows technical details but not a complete exploit.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check TOTOlink for firmware updates newer than V1.1.1-B20200824.0128
Vendor Advisory: Not provided in CVE details
Restart Required: Yes
Instructions:
1. Visit TOTOlink support website. 2. Download latest firmware for A3002R. 3. Access router web interface. 4. Navigate to firmware update section. 5. Upload and apply new firmware. 6. Reboot router.
🔧 Temporary Workarounds
Disable IPv6 Management Interface
allDisable IPv6 configuration interface if not required
Restrict Management Access
allLimit web management interface access to trusted IP addresses only
🧯 If You Can't Patch
- Isolate affected routers in separate network segments with strict firewall rules
- Implement network monitoring to detect exploitation attempts and anomalous traffic patterns
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via web interface or SSH: cat /proc/version or check web admin panel system infoCheck Version:
ssh admin@router-ip 'cat /proc/version' or check web interface system informationVerify Fix Applied:
Verify firmware version is newer than V1.1.1-B20200824.0128 and test with crafted static_gw parameter requests📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP POST requests to /formIpv6Setup
- Large static_gw parameter values in web logs
- Boa web server crashes or restarts
Network Indicators:
- HTTP requests with abnormally long static_gw parameters
- Traffic to router management port from unexpected sources
SIEM Query:
source="router-logs" AND (uri="/formIpv6Setup" OR parameter="static_gw") AND bytes > 1000