CVE-2020-8858: Moxa Mgate 5105-Mb-Eip-T Firmware

High severity, CVSS 8.8. EPSS: 8.6% chance of exploitation in the next 30 days.

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Moxa MGate 5105-MB-EIP firmware version 4.1. Authentication is required to exploit this vulnerability. The specific flaw exists within the DestIP parameter within MainPing.asp. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-9552.

Affected products

• Moxa Mgate 5105-Mb-Eip-T Firmware: up to and including 4.1
• Moxa Mgate 5105-Mb-Eip Firmware: up to and including 4.1

Published 2020-02-14. Last modified 2026-06-17.