Is CVE-2016-5804 actively exploited?

No active exploitation of CVE-2016-5804 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2016-5804 be exploited remotely?

Yes. CVE-2016-5804 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2016-5804?

CVE-2016-5804 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2016-5804

CRITICAL

CVE-2016-5804

CWE-326Published: July 15, 2016· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2016-5804 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

moxa10 product(s)

mgate mb3180 firmwaremgate mb3180mgate mb3280 firmwaremgate mb3280mgate mb3480 firmwaremgate mb3480mgate mb3170 firmwaremgate mb3170mgate mb3270 firmwaremgate mb3270

Source: NVD CPE · 10 total CPE entries