HOMEVULNERABILITIESCVE-2020-8858
HIGH

CVE-2020-8858

CWE-78Published: February 14, 2020· Updated: Jun 17, 2026

8.8
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2020-8858 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

moxa4 product(s)
mgate 5105-mb-eip firmwaremgate 5105-mb-eipmgate 5105-mb-eip-t firmwaremgate 5105-mb-eip-t
Source: NVD CPE · 4 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

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

All References (4)

→
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

Quick Facts

CVE IDCVE-2020-8858
CVSS Score8.8 / 10
SeverityHIGH
WeaknessCWE-78
CISA KEVNo
Affected1 vendor(s)
PublishedFeb 14, 2020

Related CVEs (CWE-78)

CVE-2023-2564
10.0
CVE-2022-33195
10.0
CVE-2022-33193
10.0
CVE-2022-33192
10.0
CVE-2022-33194
10.0
CVE-2023-3939
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-8858 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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