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Vulnerability record · CVE-2020-8858 · published 14 February 2020

CVE-2020-8858: Moxa mgate 5105-mb-eip firmware os command injection vulnerability

Moxa · Mgate 5105 Mb Eip Firmware

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.

8.8 CVSS 3.1 High EPSS 8.6% · top 5.1% CWE-78 · OS command injection
8.8CVSS 3.1 base score, v2 9.0
8.6%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.moxa.com/en/support/support/security-advisory/mgate-5105-mb-eip-series-protocol-gateways-vulnerability Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-20-214/ Third Party AdvisoryVDB Entry
https://www.moxa.com/en/support/support/security-advisory/mgate-5105-mb-eip-series-protocol-gateways-vulnerability Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-20-214/ Third Party AdvisoryVDB Entry

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Source: NIST National Vulnerability Database (record CVE-2020-8858), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.