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Security Advisories


MGate MB3170/MB3270/MB3280/MB3480 Series Protocol Gateways Vulnerability

  • Security Advisory ID: MPSA-220203
  • Version: V1.0
  • Release Date: Feb 17, 2022
  • Reference:
    • N/A

A product vulnerability was identified in Moxa’s MGate MB3170/MB3270/MB3280/MB3480 Series Protocol Gateways. In response to this, Moxa has developed related solutions to address these vulnerabilities.

The identified vulnerability types and potential impacts are shown below:

Item Vulnerability Type Impact
1 Channel Accessible by Non-Endpoint (CWE-300) Allows an attacker to perform a man-in-the-middle (MITM) attack on the device.

Affected Products:

The affected products and firmware versions are shown below.

Product Series Affected Versions
MGate MB3170 Series Firmware Version 4.2 or lower.
MGate MB3270 Serie Firmware Version 4.2 or lower.
MGate MB3280 Series Firmware Version 4.1 or lower.
MGate MB3480 Series Firmware Version 3.2 or lower.



Moxa has developed appropriate solutions to address the vulnerabilities. The solutions for affected products are shown below.

Product Series Solutions
MGate MB3170 Series
MGate MB3270 Series
MGate MB3280 Series
MGate MB3480 Series
Please contact Moxa Technical Support for the security patch.


We would like to express our appreciation to Pawan Sable and Dr. Faruk Kazi from CoE-CNDS Lab, VJTI in Mumbai, India, for reporting the vulnerability, working with us to help enhance the security of our products, and helping us provide a better service to our customers.

Revision History:

1.0 First Release Feb 17 , 2022

Relevant Products

MGate MB3170/MB3270 Series · MGate MB3180/MB3280/MB3480 Series ·

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