What is CVE-2021-46082?

CVE-2021-46082 is a high-severity vulnerability in Moxa Mgate 5101-Pbm-Mn, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 7.5/10. Published 2022-02-18.

How severe is CVE-2021-46082?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Moxa Mgate 5101-Pbm-Mn

CVE-2021-46082

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.

Published 2022-02-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.012 (66.3th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 66.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-401 — Missing Release of Memory after Effective Lifetime

References

www.moxa.com/en/support/product-support/security-advisory/mgate-5109-5101-proto… (Patch, Vendor Advisory)
www.moxa.com/en/support/product-support/security-advisory/tn-5900-secure-router… (Vendor Advisory)

Frequently asked questions

What is CVE-2021-46082?: CVE-2021-46082 is a high-severity vulnerability in Moxa Mgate 5101-Pbm-Mn, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 7.5/10. Published 2022-02-18.
How severe is CVE-2021-46082?: High severity. CVSS v3 base score is 7.5 out of 10.