CVE-2025-6897
📋 TL;DR
This critical vulnerability in D-Link DI-7300G+ routers allows remote attackers to execute arbitrary operating system commands by manipulating the Time parameter in the httpd_debug.asp file. The vulnerability affects all users of D-Link DI-7300G+ routers running firmware version 19.12.25A1, potentially giving attackers full control over affected devices.
💻 Affected Systems
- D-Link DI-7300G+
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing attacker to install persistent backdoors, intercept network traffic, pivot to internal networks, or use device as botnet node.
Likely Case
Unauthorized command execution leading to device configuration changes, credential theft, or denial of service.
If Mitigated
Limited impact if device is isolated in separate VLAN with strict network segmentation and access controls.
🎯 Exploit Status
Exploit details are publicly available in GitHub repository. Simple HTTP request with crafted Time parameter can trigger command injection.
🛠️ 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 for DI-7300G+. 3. Access router web interface. 4. Navigate to firmware update section. 5. Upload and apply new firmware. 6. Reboot router.
🔧 Temporary Workarounds
Disable Web Management Interface
allDisable HTTP/HTTPS management access to prevent exploitation
Access router CLI via SSH/Telnet
Navigate to web management settings
Disable HTTP/HTTPS management
Use only console/SSH for management
Network Access Control
allRestrict access to router management interface
Configure firewall rules to allow management only from trusted IPs
Implement VLAN segmentation
Use VPN for remote management
🧯 If You Can't Patch
- Isolate affected routers in separate VLAN with strict firewall rules
- Implement network monitoring for suspicious HTTP requests to httpd_debug.asp
🔍 How to Verify
Check if Vulnerable:
Check firmware version in router web interface under System Status or via CLI command 'show version'Check Version:
show version (CLI) or check web interface System Status pageVerify Fix Applied:
Verify firmware version is updated beyond 19.12.25A1 and test if httpd_debug.asp endpoint responds to crafted Time parameter📡 Detection & Monitoring
Log Indicators:
- HTTP requests to /httpd_debug.asp with unusual Time parameter values
- Command execution patterns in system logs
- Failed authentication attempts to web interface
Network Indicators:
- HTTP POST requests containing shell metacharacters in Time parameter
- Unusual outbound connections from router
- Traffic to known malicious IPs
SIEM Query:
source="router_logs" AND (uri="/httpd_debug.asp" AND (param="Time" AND value MATCH "[;|&`$()]"))