Security Enhancement: SSH Server CBC Mode Ciphers Enabled

Published: October 21, 2025

This Alert Is From MOXA

As Industrial IoT (IIoT) adoption continues to proliferate, cybersecurity has become one of the top priorities. The Moxa Product Security Incident Response Team (PSIRT) takes a proactive approach to protect products from cybersecurity vulnerabilities. Moxa PSIRT investigates all reports of vulnerabilities that could potentially affect Moxa products. Moxa created a vulnerability management policy to provide guidance and information to our customers in the event of a reported vulnerability. The management policy ensures that Moxa’s customers have steady, unambiguous resources to help them understand how Moxa resolves or mitigates reported vulnerabilities. For any queries, please email PSIRT@moxa.com.

The SSH server is configured to support Cipher Block Chaining (CBC) encryption. This may allow an attacker to recover the plaintext message from the ciphertext. (Source: Tenable Nessus)

As this issue is assessed as low severity, users may evaluate their environments and decide if updating is required.

 

This alert has come from: https://www.moxa.com/en/support/product-support/security-advisory/mpsa-257312-security-enhancement-ssh-server-cbc-mode-ciphers-enabled