CVE-2025-57105
📋 TL;DR
The DI-7400G+ router contains a command injection vulnerability in its web interface that allows attackers to execute arbitrary system commands. This affects all users of the vulnerable router model who have not applied patches. Attackers can gain full control of the device through this remote code execution flaw.
💻 Affected Systems
- D-Link DI-7400G+
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the router allowing attackers to intercept all network traffic, deploy malware to connected devices, pivot to internal networks, and maintain persistent access.
Likely Case
Router takeover leading to network monitoring, credential theft, DNS hijacking, and potential lateral movement to connected systems.
If Mitigated
Limited impact if device is behind firewall with restricted web interface access and proper network segmentation.
🎯 Exploit Status
Public proof-of-concept available on GitHub. Exploitation requires network access to web interface but no authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for latest patched firmware
Vendor Advisory: https://www.dlink.com/en/security-bulletin/
Restart Required: Yes
Instructions:
1. Visit D-Link security bulletin page
2. Download latest firmware for DI-7400G+
3. Log into router web interface
4. Navigate to firmware update section
5. Upload and apply new firmware
6. Reboot router after update completes
🔧 Temporary Workarounds
Disable Web Interface
allDisable remote access to router web management interface
Configure router to disable WAN access to management interface
Network Segmentation
allPlace router in isolated network segment with restricted access
Configure firewall rules to restrict access to router IP on ports 80/443
🧯 If You Can't Patch
- Replace vulnerable device with supported model
- Implement strict network access controls and monitor for exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check if device is DI-7400G+ and has unpatched firmware. Test by attempting exploitation using public PoC (not recommended in production).Check Version:
Check router web interface System Status or About page for firmware versionVerify Fix Applied:
Verify firmware version matches patched version from vendor advisory. Test that command injection no longer works.📡 Detection & Monitoring
Log Indicators:
- Unusual command execution in router logs
- Multiple failed login attempts followed by successful access
- Unexpected configuration changes
Network Indicators:
- Unusual outbound connections from router
- DNS queries to suspicious domains
- Traffic patterns indicating command and control
SIEM Query:
source="router_logs" AND ("ac_mng_srv_host" OR "command injection" OR unusual shell commands)