CVE-2025-9769 is a command injection vulnerability identified in the D-Link DI-7400G+ router, specifically affecting firmware version 19.12.25A1. The vulnerability resides in the function sub_478D28 within the /mng_platform.asp file. The flaw allows an attacker to manipulate the 'addr' argument by injecting shell commands, such as the example payload `echo 12345 > poc.txt`, which demonstrates the ability to execute arbitrary commands on the device. This type of vulnerability arises due to insufficient input validation or sanitization, enabling attackers to inject and execute system-level commands. The attack vector requires physical access to the device, which limits remote exploitation possibilities. The vulnerability has a CVSS 4.0 score of 2.4, indicating low severity, largely because exploitation requires local access and low privileges, and the impact on confidentiality, integrity, and availability is limited. No known exploits are currently observed in the wild, but a proof-of-concept exploit has been publicly released, increasing the risk of future exploitation. The vulnerability does not require user interaction and does not affect the device's security controls beyond the local context. No patches or vendor advisories have been linked yet, so mitigation currently relies on access control and monitoring.

For European organizations, the impact of CVE-2025-9769 is relatively limited due to the requirement for physical access to the affected device. However, in environments where D-Link DI-7400G+ routers are deployed in unsecured or semi-public areas—such as small offices, retail locations, or branch offices—an attacker with physical proximity could exploit this vulnerability to execute arbitrary commands. This could lead to unauthorized configuration changes, data leakage from the device, or pivoting to other internal network resources. Given the router’s role as a network gateway, compromise could undermine network integrity and availability. The low CVSS score reflects the limited scope and difficulty of exploitation, but organizations should not dismiss the risk, especially in high-security environments or where physical security controls are weak. Additionally, the public availability of an exploit increases the likelihood of opportunistic attacks. European organizations relying on this device should assess their physical security posture and network segmentation to mitigate potential risks.

1. Physical Security: Strengthen physical access controls to locations housing D-Link DI-7400G+ devices to prevent unauthorized personnel from interacting with the hardware. 2. Device Replacement or Upgrade: If possible, upgrade to a newer firmware version or replace the device with a model not affected by this vulnerability, as no official patch is currently available. 3. Network Segmentation: Isolate vulnerable devices on separate network segments with strict access controls to limit the impact of a compromised router. 4. Monitoring and Logging: Enable detailed logging on network devices and monitor for unusual command executions or configuration changes indicative of exploitation. 5. Disable Unnecessary Services: Review and disable any unnecessary management interfaces or services that could be leveraged in conjunction with physical access. 6. Vendor Engagement: Engage with D-Link support to seek official patches or mitigation guidance and stay updated on any forthcoming security advisories. 7. Incident Response Preparedness: Develop and test incident response plans that include scenarios involving physical device compromise to ensure rapid containment and recovery.