D-Link DIR-868L B1 2.05WWB0 fileaccess.cgi pre_api_arg os command injection

Summaryinfo

A vulnerability, which was classified as critical, was found in D-Link DIR-868L B1 2.05WWB0. This vulnerability affects unknown code of the file fileaccess.cgi. Such manipulation of the argument pre_api_arg leads to os command injection. This vulnerability is traded as CVE-2025-55583. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in D-Link DIR-868L B1 2.05WWB0 and classified as critical. Affected by this issue is some unknown functionality of the file fileaccess.cgi. The manipulation of the argument pre_api_arg with an unknown input leads to a os command injection vulnerability. Using CWE to declare the problem leads to CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. CVE summarizes:

D-Link DIR-868L B1 router firmware version FW2.05WWB02 contains an unauthenticated OS command injection vulnerability in the fileaccess.cgi component. The endpoint /dws/api/UploadFile accepts a pre_api_arg parameter that is passed directly to system-level shell execution functions without sanitization or authentication. Remote attackers can exploit this to execute arbitrary commands as root via crafted HTTP requests.

The advisory is shared for download at dlink.com. This vulnerability is handled as CVE-2025-55583 since 08/13/2025. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 08/28/2025). The MITRE ATT&CK project declares the attack technique as T1202.

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-2025-26076). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Router Operating System

Vendor

• D-Link

Name

• DIR-868L B1

Version

• 2.05WWB0

License

• commercial

Website

• Vendor: https://www.dlink.com/

CPE 2.3info

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Once again VulDB remains the best source for vulnerability data.

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