An exploitable use of hard-coded credentials vulnerability exists in multiple iw_* utilities of the Moxa AWK-3131A firmware version 1.13.

published 2020-02-25 6 y ago modified 2026-06-17 4 mo ago also EUVD-2019-14744

cvss: 6.2; version 3.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 25%
public exploits: 0; none known

An exploitable use of hard-coded credentials vulnerability exists in multiple iw_* utilities of the Moxa AWK-3131A firmware version 1.13. The device operating system contains an undocumented encryption password, allowing for the creation of custom diagnostic scripts.

Vendor advisories

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

cisa ICSA-20-063-04 updated 2020-03-03 cvss 6.2

Moxa AWK-3131A Series Industrial AP/Bridge/Client

Moxa AWK-3131A <= 1.13
affected: mitigation “Moxa has created a security patch to mitigate these vulnerabilities. Please contact Moxa technical support to obtain it. For additional information see the Moxa advisory.” 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

0.32% chance of exploitation in the next 30 days, higher than 25% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

talosintelligence.com https://talosintelligence.com/vulnerability_reports/TALOS-2019-0928 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.0	6.2	CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD	3.1	7.1	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
NVD	2.0	3.6	AV:L/AC:L/Au:N/C:P/I:P/A:N

Affected products

n/a Moxa

Classification

Weakness

CWE-798 Use of Hard-coded Credentials

References

talosintelligence.com /vulnerability_reports/TALOS-2019-0928
exploit, technical-description, third-party-advisory

Sources

CVE List CVE-2019-5139
NVD CVE-2019-5139

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