Overview
A critical security vulnerability, identified as CVE-2025-60676, has been discovered in the D-Link DIR-878A1 router firmware version FW101B04.bin. This vulnerability allows unauthenticated attackers to execute arbitrary commands on the device remotely. The flaw resides in the ‘SetNetworkSettings’ functionality within the ‘prog.cgi’ script.
Technical Details
The vulnerability stems from insecure handling of the ‘IPAddress’ and ‘SubnetMask’ parameters within the ‘SetNetworkSettings’ functionality of ‘prog.cgi’. These parameters are directly concatenated into shell commands without proper sanitization, which are then executed using the system() function. This allows an attacker to inject malicious commands by crafting a specific HTTP request. Since no authentication is required to access this functionality, an attacker can exploit this vulnerability remotely.
CVSS Analysis
Currently, a CVSS score has not been assigned to CVE-2025-60676. However, considering the unauthenticated remote command execution and the potential for complete system compromise, it is expected to be a high-severity vulnerability.
Possible Impact
Successful exploitation of this vulnerability allows an attacker to execute arbitrary commands on the affected D-Link DIR-878A1 router. This can lead to:
- Complete compromise of the router.
- Data exfiltration.
- Installation of malware.
- Denial-of-service attacks.
- Use of the router as part of a botnet.
Mitigation and Patch Steps
D-Link has been notified of this vulnerability and is expected to release a firmware patch. Users of the D-Link DIR-878A1 router with firmware version FW101B04.bin are strongly advised to:
- Monitor the D-Link security bulletin page for firmware updates.
- Apply the firmware update as soon as it becomes available.
- As a temporary measure, if possible, consider restricting access to the router’s management interface from the public internet. This is not a complete fix but will reduce the attack surface.
