CVE-2023-34214: Moxa Tn-4900 Firmware

Critical severity, CVSS 9.8. EPSS: 0.4% chance of exploitation in the next 30 days.

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 certificate-generation function, which could potentially allow malicious users to execute remote code on affected devices.

Affected products

• Moxa Tn-4900 Firmware: up to and including 1.2.4
• Moxa Tn-5900 Firmware: up to and including 3.3

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