CVE-2019-5140Network attack vector

Authenticated command execution via unescaped diagnostic filename

Published Feb 25, 2020 · Updated Aug 4, 2024

OS command injection in Moxa AWK-3131A firmware 1.13 allows remote authenticated users to execute commands through a diagnostic file name. The decryptScriptFile routine passes the unescaped name of an encrypted diagnostic script to the iw_system system-call wrapper before decryption. Low-privilege access to the network management interface is sufficient, and successful exploitation grants command execution and control of the appliance.

CVSS severity8.8
High
EPSS probability2.80%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Moxa AWK-3131A firmware 1.13 allows remote authenticated users to execute commands through a diagnostic file name. The decryptScriptFile routine passes the unescaped name of an encrypted diagnostic script to the iw_system system-call wrapper before decryption. Low-privilege access to the network management interface is sufficient, and successful exploitation grants command execution and control of the appliance.

The record

CVE
CVE-2019-5140
Published
Feb 25, 2020
Updated
Aug 4, 2024
Vendor
Moxa
Product
AWK-3131A Series
Classifications
CWE-78, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 25, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Moxa AWK-3131A firmware version 1.13

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Moxa · AWK-3131A Seriesversion=Moxa AWK-3131A firmware version 1.13

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/A:P
8.8Cisco TalosCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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