---
id: CVE-2026-111459
title: >-
  Unauthenticated server-supplied OpenVPN configuration in Moxa Remote Connect
  Suite (MRC Client)
summary: "An improper certificate validation vulnerability exists in Moxa Remote Connect Suite (MRC Client). Under certain conditions, an unauthenticated attacker\_with on-path access to the communication between the MRC Client and its server could…"
severity: high
cvss: 7.6
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N'
cvssSource: cna
cwe:
  - CWE-295
vendor: Moxa
product: Moxa Remote Connect Suite (MRC Client)
affected:
  - remote_connect_suite_mrc_client >= 1.0.0 <= 4.2.0
published: '2026-10-27'
updated: '2026-10-27'
sourceUpdated: '2026-10-27T07:08:17.598Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-111459'
references:
  - url: >-
      https://www.moxa.com/en/support/product-support/security-advisory/mpsa-269510-cve-2026-111459-cve-2026-111460-cve-2026-111461-vulnerabilities-in-moxa-remote-connect-suite-mrc-client
tags:
  - cve.org
epss: 0.00173
epssPercentile: 0.06679
ingestedAt: '2026-10-27T16:11:59.235Z'
---

## Overview

An improper certificate validation vulnerability exists in Moxa Remote Connect Suite (MRC Client). Under certain conditions, an unauthenticated attacker with on-path access to the communication between the MRC Client and its server could impersonate a trusted server and conduct a man-in-the-middle attack, potentially compromising the confidentiality and integrity of communications.

## Affected

- `remote_connect_suite_mrc_client >= 1.0.0 <= 4.2.0`

## Remediation

Please refer Moxa's security advisory: https://www.moxa.com/en/support/product-support/security-advisory/mpsa-269510-cve-2026-111459-cve-2026-111460-cve-2026-111461-vulnerabilities-in-moxa-remote-connect-suite-mrc-client