CVE-2025-13553
📋 TL;DR
A remote buffer overflow vulnerability in D-Link DWR-M920 routers allows attackers to execute arbitrary code by manipulating the submit-url parameter. This affects devices running firmware version 1.1.50. Attackers can exploit this without authentication to potentially take full control of affected routers.
💻 Affected Systems
- D-Link DWR-M920
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise leading to persistent backdoor installation, network traffic interception, lateral movement to internal networks, and botnet recruitment.
Likely Case
Remote code execution allowing attackers to modify router settings, intercept traffic, or use the device as a pivot point for further attacks.
If Mitigated
Limited impact if device is behind firewall with strict inbound filtering, though internal network exposure remains a risk.
🎯 Exploit Status
Public exploit details 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. 3. Access router admin interface. 4. Navigate to firmware update section. 5. Upload and apply new firmware. 6. Wait for router to reboot.
🔧 Temporary Workarounds
Network Segmentation
allIsolate affected routers from critical internal networks
Access Control
linuxRestrict web interface access to trusted IP addresses only
iptables -A INPUT -p tcp --dport 80 -s TRUSTED_IP -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -s TRUSTED_IP -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP
🧯 If You Can't Patch
- Replace affected devices with patched or different models
- Deploy network-based intrusion prevention systems to detect and block exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check firmware version in router web interface under System > Firmware or via SSH: cat /etc/versionCheck Version:
cat /etc/version || grep -i version /proc/cmdlineVerify Fix Applied:
Verify firmware version is no longer 1.1.50 after update📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /boafrm/formPinManageSetup
- Multiple failed buffer overflow attempts
- Sudden configuration changes
Network Indicators:
- Unusual outbound connections from router
- Traffic patterns suggesting command and control communication
SIEM Query:
source="router_logs" AND (uri="/boafrm/formPinManageSetup" OR "submit-url" AND length>100)