CVE-2023-33239

Name: CVE-2023-33239
Creator: NVD / NIST
Published: 2023-08-17T03:15:09.58+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.13%

Last modified Jun 17, 2026

CVE-2023-33239 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. TN-4900 Series firmware versions v1.2.4 and prior and TN-5900 Series firmware versions v3.3 and prior are vulnerable to the command injection vulnerability. This vulnerability stems from insufficient input validation in the key-generation function, which could potentially allow malicious users to execute remote code on affected devices.. EPSS estimates a 1.13% chance of exploitation in the next 30 days.

Description

TN-4900 Series firmware versions v1.2.4 and prior and TN-5900 Series firmware versions v3.3 and prior are vulnerable to the command injection vulnerability. This vulnerability stems from insufficient input validation in the key-generation function, which could potentially allow malicious users to execute remote code on affected devices.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

1.13%

62.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Moxa	Tn-5900 Firmware	<= 3.3
Moxa	Tn-4900 Firmware	<= 1.2.4

References

Timeline

Published: Aug 17, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-33239?

How severe is CVE-2023-33239?

CVE-2023-33239 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.13% probability of exploitation in the next 30 days.

How do I fix CVE-2023-33239?

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-2023-33239?

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

Scan your code now

Source: NVD / NIST