CVE-2023-3336: Moxa Tn-5900 Firmware

Medium severity, CVSS 5.3. EPSS: 0.6% chance of exploitation in the next 30 days.

TN-5900 Series version 3.3 and prior versions is vulnearble to user enumeration vulnerability. The vulnerability may allow a remote attacker to determine whether a user is valid during password recovery through the web login page and enable a brute force attack with valid users.

Affected products

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

Published 2023-07-05. Last modified 2026-06-17.