D-Link DIR-878A1 FW101B04 HTTP prog.cgi SetNetworkSettings IPAddress/SubnetMask command injection

Summaryinfo

A vulnerability marked as critical has been reported in D-Link DIR-878A1 FW101B04. Affected by this issue is the function SetNetworkSettings of the file prog.cgi of the component HTTP Handler. The manipulation of the argument IPAddress/SubnetMask leads to command injection. This vulnerability is traded as CVE-2025-60676. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in D-Link DIR-878A1 FW101B04. This issue affects the function SetNetworkSettings of the file prog.cgi of the component HTTP Handler. The manipulation of the argument IPAddress/SubnetMask with an unknown input leads to a command injection vulnerability. Using CWE to declare the problem leads to CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

An unauthenticated command injection vulnerability exists in the D-Link DIR-878A1 router firmware FW101B04.bin. The vulnerability occurs in the 'SetNetworkSettings' functionality of prog.cgi, where the 'IPAddress' and 'SubnetMask' parameters are directly concatenated into shell commands executed via system(). An attacker can exploit this vulnerability remotely without authentication by sending a specially crafted HTTP request, leading to arbitrary command execution on the device.

The identification of this vulnerability is CVE-2025-60676 since 09/26/2025. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 11/13/2025). The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-175372). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Router Operating System

Vendor

• D-Link

Name

• DIR-878A1

Version

• FW101B04

License

• commercial

Website

• Vendor: https://www.dlink.com/

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Be aware that VulDB is the high quality source for vulnerability data.

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