CVE-2025-15189
📋 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. This affects all devices running firmware version 1.1.50 or earlier. Attackers can potentially take full control of vulnerable devices.
💻 Affected Systems
- D-Link DWR-M920
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, data exfiltration, and use as pivot point into internal networks.
Likely Case
Device takeover for botnet participation, credential theft, or network traffic interception.
If Mitigated
Limited impact if devices are behind firewalls with strict inbound filtering and network segmentation.
🎯 Exploit Status
Public proof-of-concept exists, making exploitation straightforward for attackers.
🛠️ 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. Download latest firmware. 3. Upload via router admin interface. 4. Reboot device.
🔧 Temporary Workarounds
Network Isolation
allPlace vulnerable routers behind firewalls with strict inbound filtering
Access Restriction
allRestrict administrative interface access to trusted IP addresses only
🧯 If You Can't Patch
- Replace vulnerable devices with supported models
- Implement network segmentation to isolate vulnerable devices
🔍 How to Verify
Check if Vulnerable:
Check firmware version in router admin interface under System Status or Maintenance sectionCheck Version:
Check via web interface or SSH if enabled: cat /proc/version or show version commandsVerify Fix Applied:
Verify firmware version is newer than 1.1.50 after update📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to formDefRoute endpoint
- Buffer overflow error messages in system logs
- Multiple failed exploit attempts
Network Indicators:
- Unusual outbound connections from router
- Traffic patterns suggesting device compromise
- Exploit payloads in HTTP requests
SIEM Query:
source="router_logs" AND (uri="/boafrm/formDefRoute" OR message="buffer overflow" OR message="segmentation fault")