An issue was discovered on Moxa MGate MB3170 and MB3270 devices before 4.1, MB3280 and MB3480 devices before 3.1, MB3660 devices before 2.3…

published 2020-03-11 6 y ago modified 2026-06-17 4 mo ago also EUVD-2019-18489

cvss: 9.8; version 3.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.0%; EPSS 1.0% chance of exploitation in 30 days, percentile 63%
public exploits: 0; none known

An issue was discovered on Moxa MGate MB3170 and MB3270 devices before 4.1, MB3280 and MB3480 devices before 3.1, MB3660 devices before 2.3, and MB3180 devices before 2.1. The application's configuration file contains parameters that represent passwords in cleartext.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-20-056-01 updated 2020-02-25 cvss 8.2

Moxa MB3xxx Series Protocol Gateways

Moxa MB3170 series <= 4.0 Moxa MB3180 series <= 2.0 Moxa MB3270 series <= 4.0 Moxa MB3280 series <= 3.0 Moxa MB3480 series <= 3.0 Moxa MB3660 series <= 2.2
affected: mitigation “MB3170 Series: Download the new firmware.” moxa.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

1.01% chance of exploitation in the next 30 days, higher than 63% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.0	9.8	CVSS:3.0/AC:L/AV:N/A:H/C:H/I:H/PR:N/S:U/UI:N
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CNA	3.0	9.8	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:P/I:N/A:N

Classification

Weakness

CWE-312 Cleartext Storage of Sensitive Information
CWE-522 Insufficiently Protected Credentials

References

moxa.com /en/support/support/security-advisory/mb3710-3180-3270-3280-3480-3660-vulnerabilities
vendor-advisory
us-cert.gov /ics/advisories/icsa-20-056-01
third-party-advisory, us-government-resource

Sources

CVE List CVE-2019-9104
NVD CVE-2019-9104

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary