What is CVE-2018-16590?

CVE-2018-16590 is a critical-severity vulnerability in Furuno Felcom 250, classified under Improper Authentication. CVSS score: 9.8/10. Published 2018-09-06.

How severe is CVE-2018-16590?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in Furuno Felcom 250

CVE-2018-16590

FURUNO FELCOM 250 and 500 devices use only client-side JavaScript in login.js for authentication.

Vulnerability class: Broken Authentication

Published 2018-09-06 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.024 (83.2th percentile), scored 2026-10-03.

Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 83.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.024 · newest: 0.024 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

cyberskr.com/blog/furuno-felcom.html (Technical Description, Exploit, Third Party Advisory)
gist.github.com/CyberSKR/34a8d6be7646a4bfd4df455f9f52500f (Third Party Advisory)

Frequently asked questions

What is CVE-2018-16590?: CVE-2018-16590 is a critical-severity vulnerability in Furuno Felcom 250, classified under Improper Authentication. CVSS score: 9.8/10. Published 2018-09-06.
How severe is CVE-2018-16590?: Critical severity. CVSS v3 base score is 9.8 out of 10.