CVE-2025-55583: D-Link Dir-868l Firmware

Critical severity, CVSS 9.8. EPSS: 7% chance of exploitation in the next 30 days.

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.

Affected products

• D-Link Dir-868l Firmware: version 2.05b02 only

Published 2025-08-28. Last modified 2026-06-17.