CVE-2023-34213: Moxa Tn-5900 Firmware

Critical severity, CVSS 9.8. EPSS: 0.8% chance of exploitation in the next 30 days.

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

Affected products

• Moxa Tn-5900 Firmware: up to and including 3.3

Published 2023-08-17. Last modified 2026-06-17.