CVE-2025-15192 is a command injection vulnerability identified in the D-Link DWR-M920 router series, specifically affecting firmware versions up to 1.1.50. The vulnerability resides in the sub_415328 function of the /boafrm/formLtefotaUpgradeQuectel file, where the fota_url parameter is improperly sanitized. This flaw allows an attacker to inject arbitrary commands into the system by manipulating the fota_url argument, which is processed by the router's firmware during LTE firmware over-the-air (FOTA) upgrade queries. The attack vector is remote and does not require authentication or user interaction, significantly lowering the barrier for exploitation. The CVSS 4.0 base score is 5.3 (medium), reflecting moderate impact and ease of exploitation. The vulnerability affects confidentiality, integrity, and availability since arbitrary command execution can lead to data leakage, system compromise, or denial of service. Although no exploits have been reported in the wild yet, public disclosure means attackers can develop exploits rapidly. The vulnerability is particularly concerning for environments relying on these routers for critical connectivity, as attackers could gain persistent control or disrupt network operations. No official patches or firmware updates have been linked yet, so mitigation currently relies on network-level controls and monitoring.

For European organizations, this vulnerability poses a significant risk to network security and operational continuity. The DWR-M920 router is used in various enterprise and industrial settings for LTE connectivity, including remote sites and IoT deployments. Successful exploitation could allow attackers to execute arbitrary commands, potentially leading to unauthorized data access, network pivoting, or complete device takeover. This could disrupt business operations, compromise sensitive information, and facilitate further attacks within the network. The remote and unauthenticated nature of the vulnerability increases the likelihood of exploitation, especially in organizations with exposed management interfaces or insufficient network segmentation. Critical infrastructure sectors relying on LTE routers for backup or primary connectivity may face increased risk of service disruption. Additionally, the lack of current patches means organizations must rely on compensating controls, increasing operational complexity and risk exposure.

1. Immediately restrict access to the router's management interface by implementing network segmentation and firewall rules to limit exposure to trusted IP addresses only. 2. Disable remote management features if not strictly necessary, especially those accessible from the internet. 3. Monitor network traffic for unusual requests targeting the /boafrm/formLtefotaUpgradeQuectel endpoint or suspicious command injection patterns. 4. Employ intrusion detection/prevention systems (IDS/IPS) with signatures or heuristics to detect command injection attempts. 5. Regularly audit and inventory all D-Link DWR-M920 devices within the organization to ensure awareness of affected assets. 6. Engage with D-Link support or official channels to obtain firmware updates or patches as soon as they become available and prioritize timely deployment. 7. Consider temporary replacement or isolation of vulnerable devices in critical environments until patches are applied. 8. Educate network administrators about the vulnerability and signs of exploitation to enhance detection and response capabilities.