Overview
A critical security vulnerability, identified as CVE-2025-13306, has been discovered in several D-Link router models. This flaw allows for remote command injection, potentially giving attackers control over vulnerable devices. The affected models include D-Link DWR-M920, DWR-M921, DIR-822K and DIR-825M, all running firmware version 1.1.5. This is a serious issue, as successful exploitation could lead to data breaches, denial of service, and other malicious activities.
Technical Details
The vulnerability resides within the /boafrm/formDebugDiagnosticRun file in the affected D-Link router firmware. Specifically, the host argument is susceptible to command injection. An attacker can manipulate this argument to inject arbitrary commands that will be executed by the router’s operating system. Because the exploit is publicly available, the risk of exploitation is significantly increased.
CVSS Analysis
The Common Vulnerability Scoring System (CVSS) has assigned this vulnerability a score of 6.3, indicating a MEDIUM severity.
- CVSS Score: 6.3
- Vector: (Provide vector details if you have them. Example: AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L)
- This score reflects the potential for remote exploitation and the impact on confidentiality, integrity, and availability.
Possible Impact
Successful exploitation of CVE-2025-13306 can have severe consequences:
- Remote Code Execution: Attackers can execute arbitrary commands on the router, potentially gaining full control of the device.
- Data Breach: Sensitive information stored on or transmitted through the router could be compromised.
- Denial of Service (DoS): The router could be rendered unusable, disrupting network connectivity.
- Malware Distribution: The compromised router could be used to distribute malware to other devices on the network.
- Botnet Recruitment: The router could be added to a botnet, used for distributed attacks.
Mitigation and Patch Steps
To mitigate the risk posed by CVE-2025-13306, users of the affected D-Link router models are strongly advised to take the following steps:
- Check Your Router Model and Firmware Version: Verify that you are using one of the affected models (DWR-M920, DWR-M921, DIR-822K, DIR-825M) and that the firmware version is 1.1.5.
- Apply Firmware Update: Visit the D-Link website and download the latest firmware update for your specific router model. Follow the instructions provided by D-Link to install the update. This is the most critical step.
- Disable Remote Management: If possible, disable remote management access to your router. This will prevent attackers from accessing the router’s configuration interface from the internet.
- Use a Strong Password: Ensure that you are using a strong, unique password for your router’s administrative interface.
- Monitor Network Traffic: Keep an eye on your network traffic for any suspicious activity.
