CVE-2025-15357
📋 TL;DR
This CVE describes a command injection vulnerability in D-Link DI-7400G+ routers that allows remote attackers to execute arbitrary commands on affected devices. Attackers can exploit this by manipulating the 'cmd' parameter in the /msp_info.htm endpoint. Organizations using these routers with internet-facing management interfaces are at risk.
💻 Affected Systems
- D-Link DI-7400G+
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise allowing attacker to install persistent backdoors, pivot to internal networks, intercept traffic, or brick the device.
Likely Case
Router compromise leading to network traffic interception, DNS hijacking, credential theft, or use as botnet node.
If Mitigated
Limited impact if device is behind firewall with restricted management interface access and proper network segmentation.
🎯 Exploit Status
Public proof-of-concept available on GitHub. Exploitation requires sending crafted HTTP requests to vulnerable endpoint.
🛠️ 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. Upload via web interface. 4. Reboot router.
🔧 Temporary Workarounds
Disable web management interface
allPrevent access to vulnerable endpoint by disabling web management
Router-specific configuration via CLI or web interface
Restrict management interface access
allLimit access to management interface to trusted IPs only
Configure firewall rules to restrict access to router management IP/ports
🧯 If You Can't Patch
- Isolate router on separate VLAN with strict firewall rules
- Implement network monitoring for suspicious traffic to router management interface
🔍 How to Verify
Check if Vulnerable:
Check if router responds to crafted requests at http://[router_ip]/msp_info.htm?flag=cmd with command injection payloadsCheck Version:
Check web interface or use 'show version' via CLI if availableVerify Fix Applied:
Test if command injection payloads no longer execute after firmware update📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP requests to /msp_info.htm with cmd parameter
- Suspicious command execution in router logs
Network Indicators:
- HTTP requests containing shell metacharacters or command injection patterns
- Unexpected outbound connections from router
SIEM Query:
http.url:*msp_info.htm* AND http.uri_query:*cmd=* AND (http.uri_query:*;* OR http.uri_query:*|* OR http.uri_query:*`*)