CVE-2020-8858

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 8.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-02-14 · updated 2026-06-17
Weakness: CWE-78

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.

Affected products

Moxa Mgate 5105-Mb-Eip-T Firmware: through 4.1
Moxa Mgate 5105-Mb-Eip Firmware: through 4.1

References

https://www.moxa.com/en/support/support/security-advisory/mgate-5105-mb-eip-series-protocol-gateways-vulnerability
https://www.zerodayinitiative.com/advisories/ZDI-20-214/
https://www.moxa.com/en/support/support/security-advisory/mgate-5105-mb-eip-series-protocol-gateways-vulnerability
https://www.zerodayinitiative.com/advisories/ZDI-20-214/

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