The NPort IA5000A Series devices use Telnet as one of the network device management services. Telnet does not support the encryption of client-server communications, making it vulnerable to Man-in-the-Middle attacks.

Cleartext transmission of sensitive information via Moxa Service in NPort IA5000A series serial devices. Successfully exploiting the vulnerability could enable attackers to read authentication data, device configuration, and other sensitive data transmitted over Moxa Service.

In multiple versions of NPort IA5000A Series, the result of exporting a device’s configuration contains the passwords of all users on the system and other sensitive data in the original form if “Pre-shared key” doesn’t set.