CVE-2019-5138: Moxa Awk-3131a Firmware

Critical severity, CVSS 9.9. EPSS: 5.2% chance of exploitation in the next 30 days.

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.

Affected products

• Moxa Awk-3131a Firmware: version 1.13 only

Published 2020-02-25. Last modified 2026-06-17.