CVE-2019-5138

Name: CVE-2019-5138
Creator: NVD / NIST
Published: 2020-02-25T16:15:10.5+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.9/10EPSS 5.36%

Last modified Jun 17, 2026

CVE-2019-5138 is a critical-severity vulnerability rated 9.9/10 on the CVSS scale. An exploitable command injection vulnerability exists in encrypted diagnostic script functionality of the Moxa AWK-3131A firmware version 1.13. A specially crafted diagnostic script file can cause arbitrary busybox commands to be executed, resulting in remote control over the device. EPSS estimates a 5.36% chance of exploitation in the next 30 days.

Description

An exploitable command injection vulnerability exists in encrypted diagnostic script functionality of the Moxa AWK-3131A firmware version 1.13. A specially crafted diagnostic script file can cause arbitrary busybox commands to be executed, resulting in remote control over the device. An attacker can send diagnostic while authenticated as a low privilege user to trigger this vulnerability.

Metrics

CVSS 3.1

9.9/10

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

EPSS Probability

5.36%

91.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Moxa	Awk-3131a Firmware	1.13

References

https://talosintelligence.com/vulnerability_reports/TALOS-2019-0927Exploit, Technical Description, Third Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2019-0927Exploit, Technical Description, Third Party Advisory

Timeline

Published: Feb 25, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-5138?

How severe is CVE-2019-5138?

CVE-2019-5138 has a CVSS score of 9.9/10 (CRITICAL severity). The EPSS model estimates a 5.36% probability of exploitation in the next 30 days.

How do I fix CVE-2019-5138?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-5138?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST