What is CVE-2016-5804?

CVE-2016-5804 is a critical-severity vulnerability in Moxa Mgate Mb3170, classified under Inadequate Encryption Strength. CVSS score: 9.8/10. Published 2016-07-15.

How severe is CVE-2016-5804?

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

Vulnerability in Moxa Mgate Mb3170

CVE-2016-5804

Moxa MGate MB3180 before 1.8, MGate MB3280 before 2.7, MGate MB3480 before 2.6, MGate MB3170 before 2.5, and MGate MB3270 before 2.7 use weak encryption, which allows remote attackers to bypass authentication via a brute-force series of guesses for a parameter value.

Published 2016-07-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.011 (64.7th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 64.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-326 — Inadequate Encryption Strength

References

ics-cert.us-cert.gov/advisories/ICSA-16-196-02 (US Government Resource, Third Party Advisory)
www.securityfocus.com/bid/91777 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2016-5804?: CVE-2016-5804 is a critical-severity vulnerability in Moxa Mgate Mb3170, classified under Inadequate Encryption Strength. CVSS score: 9.8/10. Published 2016-07-15.
How severe is CVE-2016-5804?: Critical severity. CVSS v3 base score is 9.8 out of 10.