CVE-2025-60552
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on D-Link DIR600L routers by exploiting a buffer overflow in the formTcpipSetup function. Attackers can trigger this by sending specially crafted requests containing malicious curTime parameter values. All users running the vulnerable firmware version are affected.
💻 Affected Systems
- D-Link DIR600L
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete router compromise, network traffic interception, credential theft, and lateral movement to connected devices.
Likely Case
Router crash/reboot causing denial of service, or limited code execution allowing network reconnaissance and persistence.
If Mitigated
Denial of service only if exploit attempts are blocked by network controls, with no code execution.
🎯 Exploit Status
Public proof-of-concept code exists in GitHub repository. Exploitation appears straightforward based on available technical details.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: Yes
Instructions:
1. Check D-Link support site for firmware updates
2. If update available, download and install via web interface
3. Reboot router after installation
4. Verify firmware version changed from FW116WWb01
🔧 Temporary Workarounds
Disable Remote Management
allPrevent external access to router web interface
Network Segmentation
allIsolate router management interface from untrusted networks
🧯 If You Can't Patch
- Replace router with supported model
- Implement strict firewall rules blocking access to router management interface from untrusted networks
🔍 How to Verify
Check if Vulnerable:
Access router web interface, navigate to System Info or similar page, check if firmware version is FW116WWb01Check Version:
curl -s http://router-ip/status.html | grep firmware or check web interfaceVerify Fix Applied:
Check firmware version after update - should no longer be FW116WWb01📡 Detection & Monitoring
Log Indicators:
- Multiple failed HTTP requests to formTcpipSetup endpoint
- Router crash/reboot logs
- Unusual POST requests with long curTime parameters
Network Indicators:
- HTTP POST requests to /goform/formTcpipSetup with unusually long curTime parameter
- Traffic patterns suggesting buffer overflow attempts
SIEM Query:
source="router_logs" AND (uri="/goform/formTcpipSetup" AND param_length>1000) OR event="router_reboot"