CVE-2021-46082

Name: CVE-2021-46082
Creator: NVD / NIST
Published: 2022-02-18T20:15:11.533+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.16%

Last modified Jun 17, 2026

CVE-2021-46082 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Moxa TN-5900 v3.1 series routers, MGate 5109 v2.2 series protocol gateways, and MGate 5101-PBM-MN v2.1 series protocol gateways were discovered to contain a memory leak which allows attackers to cause a Denial of Service (DoS) via crafted packets.. EPSS estimates a 1.16% chance of exploitation in the next 30 days.

Description

Moxa TN-5900 v3.1 series routers, MGate 5109 v2.2 series protocol gateways, and MGate 5101-PBM-MN v2.1 series protocol gateways were discovered to contain a memory leak which allows attackers to cause a Denial of Service (DoS) via crafted packets.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.16%

63.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-401

Affected Software

Vendor	Product	Versions
Moxa	Tn-5916-Wv-T Firmware	<= 3.1
Moxa	Tn-5916-Wv-Ct-T Firmware	<= 3.1
Moxa	Mgate 5109 Firmware	<= 2.2
Moxa	Mgate 5109-T Firmware	<= 2.2
Moxa	Mgate 5101-Pbm-Mn Firmware	<= 2.1
Moxa	Mgate 5101-Pbm-Mn-T Firmware	<= 2.1

References

https://www.moxa.com/en/support/product-support/security-advisory/mgate-5109-5101-protocol-gateways-vulnerabilityPatch, Vendor Advisory
https://www.moxa.com/en/support/product-support/security-advisory/tn-5900-secure-routers-vulnerabilityVendor Advisory
https://www.moxa.com/en/support/product-support/security-advisory/mgate-5109-5101-protocol-gateways-vulnerabilityPatch, Vendor Advisory
https://www.moxa.com/en/support/product-support/security-advisory/tn-5900-secure-routers-vulnerabilityVendor Advisory

Timeline

Published: Feb 18, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-46082?

How severe is CVE-2021-46082?

CVE-2021-46082 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.16% probability of exploitation in the next 30 days.

How do I fix CVE-2021-46082?

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-2021-46082?

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

Scan your code now

Source: NVD / NIST