CVE-2020-8858

Name: CVE-2020-8858
Creator: NVD / NIST
Published: 2020-02-14T18:15:11.433+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 7.44%

Last modified Jun 17, 2026

CVE-2020-8858 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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. EPSS estimates a 7.44% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

7.44%

93.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Moxa	Mgate 5105-Mb-Eip Firmware	<= 4.1
Moxa	Mgate 5105-Mb-Eip-T Firmware	<= 4.1

References

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

Timeline

Published: Feb 14, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-8858?

How severe is CVE-2020-8858?

CVE-2020-8858 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 7.44% probability of exploitation in the next 30 days.

How do I fix CVE-2020-8858?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-8858?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST