CVE-2025-56109
📋 TL;DR
This CVE describes an OS command injection vulnerability in Ruijie RG-BCR860 routers that allows attackers to execute arbitrary commands on the device. Attackers can exploit this by sending a crafted POST request to the wireless management interface. Organizations using Ruijie RG-BCR860 routers are affected.
💻 Affected Systems
- Ruijie RG-BCR860
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise leading to network infiltration, data exfiltration, and use as a pivot point for attacking internal networks.
Likely Case
Router takeover allowing traffic interception, credential theft, and deployment of persistent backdoors.
If Mitigated
Limited impact if network segmentation and proper access controls prevent exploitation attempts.
🎯 Exploit Status
Exploitation requires network access to the management interface but appears straightforward based on available documentation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: Yes
Instructions:
1. Contact Ruijie support for patch availability. 2. If patch is available, download from official vendor portal. 3. Backup configuration. 4. Apply firmware update. 5. Verify fix and restore configuration if needed.
🔧 Temporary Workarounds
Disable wireless management interface
linuxTemporarily disable the vulnerable wireless management component
# Requires access to device CLI
# Specific commands depend on Ruijie CLI syntax
Restrict network access
linuxLimit access to management interface using firewall rules
iptables -A INPUT -p tcp --dport 80 -s trusted_network -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
🧯 If You Can't Patch
- Isolate affected routers in separate VLAN with strict access controls
- Implement network monitoring for suspicious POST requests to /usr/lib/lua/luci/control/admin/wireless.lua
🔍 How to Verify
Check if Vulnerable:
Check if device responds to POST requests at the vulnerable endpoint and test with safe command injection payloadsCheck Version:
show version (Ruijie CLI command)Verify Fix Applied:
Test if command injection attempts are properly sanitized or blocked after applying vendor patch📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to wireless.lua
- Command execution patterns in system logs
- Failed authentication attempts to management interface
Network Indicators:
- Suspicious HTTP POST traffic to router management interface
- Unexpected outbound connections from router
SIEM Query:
source="router_logs" AND (url="/usr/lib/lua/luci/control/admin/wireless.lua" OR cmd="action_wireless")