CVE-2025-54406
📋 TL;DR
This CVE describes OS command injection vulnerabilities in Planet WGR-500 routers that allow remote attackers to execute arbitrary commands via specially crafted HTTP requests. Attackers can exploit the formPingCmd functionality by manipulating the 'counts' parameter to gain system-level access. Organizations using Planet WGR-500 v1.3411b190912 are affected.
💻 Affected Systems
- Planet WGR-500
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attacker to install persistent backdoors, pivot to internal networks, exfiltrate sensitive data, and use the device as a botnet node.
Likely Case
Router takeover leading to network traffic interception, DNS manipulation, credential theft, and lateral movement to connected systems.
If Mitigated
Limited impact if device is behind firewall with strict inbound rules and network segmentation prevents lateral movement.
🎯 Exploit Status
The Talos Intelligence report includes technical details that make weaponization straightforward. Command injection via HTTP parameters is a well-understood attack vector with many existing tools.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: No
Instructions:
1. Check Planet website for firmware updates. 2. If update available, download from official source. 3. Backup current configuration. 4. Upload and apply new firmware through web interface. 5. Verify successful update and restore configuration if needed.
🔧 Temporary Workarounds
Disable Web Management Interface
allPrevent HTTP-based exploitation by disabling the web interface if not required for operations.
Access router CLI via SSH/Telnet
Navigate to web interface settings
Disable HTTP/HTTPS management
Network Access Control
linuxRestrict access to router management interface using firewall rules.
iptables -A INPUT -p tcp --dport 80 -s TRUSTED_IP -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
🧯 If You Can't Patch
- Isolate affected routers in dedicated VLAN with strict firewall rules preventing outbound connections
- Implement network monitoring for unusual HTTP requests to router management interface
🔍 How to Verify
Check if Vulnerable:
Check firmware version in web interface: System > Firmware or via CLI command 'show version'. If version matches v1.3411b190912, device is vulnerable.Check Version:
ssh admin@router_ip 'show version' or check web interface at /cgi-bin/getSysInfo.cgiVerify Fix Applied:
After applying any mitigation, test with controlled exploitation attempt using modified 'counts' parameter in ping request to verify command injection is blocked.📡 Detection & Monitoring
Log Indicators:
- HTTP requests with unusual 'counts' parameter values
- Ping commands with shell metacharacters in parameters
- Unexpected process execution from web server context
Network Indicators:
- HTTP POST requests to formPingCmd with shell characters in parameters
- Unusual outbound connections from router to external IPs
SIEM Query:
source="router_logs" AND (url="*formPingCmd*" AND (param="*counts=*;*" OR param="*counts=*|*" OR param="*counts=*`*"))