CVE-2026-2000
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary commands on DCN DCME-320 devices through command injection in the Web Management Backend. Attackers can exploit this by manipulating the ip_list parameter in the bridge_cfg.php file. All users of DCN DCME-320 devices up to version 20260121 are affected.
💻 Affected Systems
- DCN DCME-320
📦 What is this software?
Dcme 320 Firmware by Dcnetworks
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise allowing attackers to execute arbitrary commands with system privileges, potentially leading to complete device takeover, data exfiltration, or use as a pivot point into internal networks.
Likely Case
Remote code execution allowing attackers to modify device configurations, install malware, or use the device as part of a botnet.
If Mitigated
Limited impact if proper network segmentation and access controls prevent external access to the web management interface.
🎯 Exploit Status
Exploit code is publicly available on GitHub, making this easily exploitable by attackers with basic skills.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch available. Vendor has not responded to disclosure. Consider workarounds or replacement.
🔧 Temporary Workarounds
Network Access Restriction
linuxRestrict access to the web management interface to trusted IP addresses only
iptables -A INPUT -p tcp --dport 80 -s TRUSTED_IP -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -s TRUSTED_IP -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP
Disable Web Management Interface
linuxDisable the vulnerable web interface if not required for operations
service httpd stop
systemctl disable httpd
🧯 If You Can't Patch
- Isolate affected devices in a separate VLAN with strict firewall rules
- Implement network monitoring and intrusion detection for suspicious traffic to/from affected devices
🔍 How to Verify
Check if Vulnerable:
Check device version via web interface or SSH: cat /etc/version | grep DCME-320Check Version:
cat /etc/versionVerify Fix Applied:
No official fix available. Verify workarounds by testing web interface accessibility and reviewing firewall rules.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /function/system/basic/bridge_cfg.php
- Suspicious command execution in system logs
- Multiple failed login attempts followed by successful access
Network Indicators:
- Unusual outbound connections from device
- Traffic to known malicious IPs
- Unexpected port scanning from device
SIEM Query:
source="device_logs" AND (uri="/function/system/basic/bridge_cfg.php" OR cmd="*apply_config*")