CVE-2025-9387 is a security vulnerability identified in the DCN DCME-720 device, specifically version 9.1.5.11. The flaw exists in the Web Management Backend component, within the file /usr/local/www/function/audit/newstatistics/ip_block.php. The vulnerability arises from improper sanitization or validation of the 'ip' argument, which allows an attacker to perform OS command injection. This means that by manipulating the 'ip' parameter, an attacker can inject arbitrary operating system commands that the backend executes with the privileges of the web management service. The attack vector is remote and does not require user interaction, making exploitation feasible over the network without authentication. The vendor was notified but has not responded or issued a patch, and public exploit code is available, increasing the risk of exploitation. Although the vulnerability is confirmed in DCME-720 9.1.5.11, other DCN products may also be affected due to shared codebases or similar backend implementations. The CVSS v4.0 score is 5.3 (medium severity), reflecting the network attack vector, low complexity, no authentication required, and limited impact on confidentiality, integrity, and availability. However, the presence of public exploits and lack of vendor response elevate the urgency for mitigation. This vulnerability could allow attackers to execute arbitrary commands, potentially leading to unauthorized access, data leakage, or disruption of device functionality, depending on the commands executed and the privileges of the web management backend process.

For European organizations using DCN DCME-720 devices, this vulnerability poses a significant risk to network infrastructure security. The ability to remotely execute OS commands without authentication can lead to full compromise of the affected device, which is likely used for network management or communication purposes. Compromise could result in unauthorized access to internal networks, interception or manipulation of network traffic, disruption of services, or use of the device as a pivot point for further attacks. Given the device's role, critical infrastructure sectors such as telecommunications, government agencies, and enterprises relying on DCN equipment could face operational disruptions and data breaches. The lack of vendor response and patches increases the window of exposure, and public exploit availability raises the likelihood of active exploitation attempts. European organizations must consider the potential for espionage, sabotage, or ransomware attacks leveraging this vulnerability, especially in environments where these devices are integral to network operations.

1. Immediate network-level controls: Restrict access to the web management interface of DCN DCME-720 devices to trusted management networks only, using firewall rules or network segmentation to prevent exposure to untrusted networks or the internet. 2. Implement strict access control lists (ACLs) to limit which IP addresses can reach the vulnerable endpoint. 3. Monitor network traffic and device logs for unusual or suspicious requests targeting the /usr/local/www/function/audit/newstatistics/ip_block.php path or attempts to inject commands via the 'ip' parameter. 4. If possible, disable the vulnerable web management interface or restrict its functionality until a vendor patch is available. 5. Employ intrusion detection/prevention systems (IDS/IPS) with signatures or heuristics to detect command injection attempts against this device. 6. Consider deploying web application firewalls (WAF) in front of management interfaces to filter malicious input. 7. Maintain an inventory of all DCN devices and verify firmware versions; avoid upgrading to the vulnerable version 9.1.5.11 or roll back if feasible. 8. Engage with DCN or authorized support channels to seek official patches or mitigations. 9. Prepare incident response plans to quickly isolate and remediate compromised devices. 10. Educate network administrators about this vulnerability and the importance of securing management interfaces.