CVE-2025-7194
📋 TL;DR
A critical stack-based buffer overflow vulnerability in D-Link DI-500WF routers allows remote attackers to execute arbitrary code by manipulating the 'ip' parameter in the ip_position.asp file. This affects D-Link DI-500WF routers running firmware version 17.04.10A1T. Attackers can exploit this remotely without authentication to potentially take full control of affected devices.
💻 Affected Systems
- D-Link DI-500WF
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, creation of persistent backdoors, lateral movement to internal networks, and botnet enrollment.
Likely Case
Remote code execution allowing attackers to modify device configuration, intercept network traffic, or use the device as a pivot point for further attacks.
If Mitigated
Limited impact if devices are behind firewalls with strict inbound filtering and network segmentation prevents lateral movement.
🎯 Exploit Status
Proof-of-concept exploit code is publicly available on GitHub, making exploitation straightforward for attackers with basic skills.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.dlink.com/
Restart Required: Yes
Instructions:
1. Check D-Link website for firmware updates. 2. Download latest firmware for DI-500WF. 3. Access router admin interface. 4. Navigate to firmware update section. 5. Upload and apply new firmware. 6. Reboot router after update completes.
🔧 Temporary Workarounds
Network Segmentation and Access Control
allIsolate affected routers from critical networks and restrict access to management interfaces.
Firewall Rules
allBlock external access to router management interfaces and restrict internal access to trusted IPs only.
🧯 If You Can't Patch
- Immediately disconnect affected devices from internet-facing positions
- Replace vulnerable devices with supported models that receive security updates
🔍 How to Verify
Check if Vulnerable:
Check firmware version in router admin interface under System Status or Firmware Update section.Check Version:
No CLI command available. Must check via web interface at http://[router-ip]/Verify Fix Applied:
Verify firmware version has been updated to a version newer than 17.04.10A1T.📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP requests to ip_position.asp with long ip parameters
- Multiple failed login attempts followed by buffer overflow patterns
Network Indicators:
- HTTP POST requests to /ip_position.asp with unusually long ip parameter values
- Traffic patterns suggesting exploitation attempts
SIEM Query:
http.url:*ip_position.asp* AND http.request.method:POST AND http.request.body:*ip=* AND http.request.body.length>100