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Security Advisories


Secure Router EDR and TN Series Improper Input Validation Vulnerabilities

  • Security Advisory ID: MPSA-221106
  • Version: V1.0
  • Release Date: Nov 28, 2022

Successful exploitation of the improper input validation vulnerability could allow a remote attacker to cause a buffer overflow that crashes the web service.

The identified vulnerability types and potential impacts are shown below:

Item Vulnerability Type Impact
1 Improper Input Validation
An attacker could craft a HTTP/HTTPS request that is designed to cause the web service to crash.

Affected Products:

The affected products and firmware versions are shown below.

Product Series Affected Versions
EDR-810 Series Firmware v5.12 or lower.
EDR-G902 Series Firmware v5.7 or lower.
EDR-G903 Series Firmware v5.7 or lower.
TN-5916 Series Firmware v3.2 or lower.
TN-4900 Series Firmware v1.0 or lower.



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

Product Series Solutions
EDR-810 Series Please upgrade to firmware version v5.12.13 or higher.
EDR-G902 Series Please upgrade to firmware version v5.7.9 or higher.
EDR-G903 Series Please upgrade to firmware version v5.7.11 or higher.
TN-5916 Series Please upgrade to firmware version v3.3 or higher.
TN-4900 Series Please contact Moxa Technical Support for the security patch.



We would like to express our appreciation to CNCERT 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 Nov 28, 2022

Relevant Products

EDR-810 Series · EDR-G902 Series · EDR-G903 Series · TN-4900 Series · TN-5900 Series ·

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