CVE-2021-46559: Moxa Tn-5900 Firmware

High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days.

The firmware on Moxa TN-5900 devices through 3.1 has a weak algorithm that allows an attacker to defeat an inspection mechanism for integrity protection.

Affected products

• Moxa Tn-5900 Firmware: up to and including 3.1

Published 2022-01-26. Last modified 2026-06-17.