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CRITICAL

CVE-2025-55583

CVSS v3

9.8

CRITICAL

EPSS Score

7.0 %

exploit probability, as of 2026-10-05

CISA KEV

No

known exploited

Exploitation

—

SSVC status

Description

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.

Technical details

Published
2025-08-28

Frequently asked questions

What is CVE-2025-55583?

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.

Is CVE-2025-55583 actively exploited?

Active exploitation of CVE-2025-55583 has not been confirmed. Its EPSS score was 7.0% on 2026-10-05, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2025-55583?

CVE-2025-55583 has a CVSS v3 base score of 9.8 (CRITICAL severity).

Is CVE-2025-55583 affecting your environment?

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