CVE-2025-15193
📋 TL;DR
A buffer overflow vulnerability in D-Link DWR-M920 routers allows remote attackers to execute arbitrary code by manipulating the submit-url parameter in the formParentControl function. This affects all DWR-M920 devices running firmware version 1.1.50 or earlier. Successful exploitation could lead to complete system compromise.
💻 Affected Systems
- D-Link DWR-M920
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to full device compromise, credential theft, network pivoting, and persistent backdoor installation.
Likely Case
Remote code execution allowing attackers to modify device settings, intercept traffic, or use the device as a foothold for further attacks.
If Mitigated
Limited impact if device is behind strict firewall rules, not internet-facing, and network segmentation prevents lateral movement.
🎯 Exploit Status
Public proof-of-concept exploit code is available on GitHub, making exploitation straightforward for attackers with basic skills.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available at time of analysis
Restart Required: Yes
Instructions:
1. Check D-Link security advisories for firmware updates. 2. Download latest firmware from official D-Link support site. 3. Upload firmware via web interface. 4. Reboot device after update.
🔧 Temporary Workarounds
Disable Remote Management
allPrevent external access to the vulnerable web interface
Access router web interface -> Advanced -> Remote Management -> Disable
Restrict Web Interface Access
allLimit access to router management interface to trusted IPs only
Access router web interface -> Advanced -> Firewall -> Add rules to restrict port 80/443 access
🧯 If You Can't Patch
- Isolate affected devices in separate network segment with strict firewall rules
- Implement network monitoring for suspicious traffic to/from router management interface
🔍 How to Verify
Check if Vulnerable:
Check firmware version via router web interface: Login -> Status -> Device Info -> Firmware VersionCheck Version:
curl -s http://router-ip/status_deviceinfo.htm | grep 'Firmware Version'Verify Fix Applied:
Verify firmware version is above 1.1.50 after update📡 Detection & Monitoring
Log Indicators:
- Multiple POST requests to /boafrm/formParentControl with long submit-url parameters
- Unusual process execution or system reboots
Network Indicators:
- Unusual outbound connections from router
- Traffic to known exploit hosting sites
- Port scanning originating from router
SIEM Query:
source="router-logs" AND (uri="/boafrm/formParentControl" AND submit-url.length>100) OR (event="buffer_overflow" AND device="DWR-M920")