CVE-2026-111459

Unauthenticated server-supplied OpenVPN configuration in Moxa Remote Connect Suite (MRC Client)

Published Oct 27, 2026 CVSS 4.0 · 7.6 High EPSS < 1% KEV · Not listed
Description
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.

Remediation

Vendor Solution

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

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Moxa moxa Remote Connect Suite (mrc Client)
Vendors & Products Moxa moxa Remote Connect Suite (mrc Client)
Type Values Removed Values Added
Description 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.
Title Unauthenticated server-supplied OpenVPN configuration in Moxa Remote Connect Suite (MRC Client)
First Time appeared Moxa
Moxa moxa Remote Connect Suite Mrc Client
Weaknesses CWE-295
CPEs cpe:2.3:a:moxa:moxa_remote_connect_suite_mrc_client_:*:*:*:*:*:*:*:*
cpe:2.3:a:moxa:moxa_remote_connect_suite_mrc_client_:4.2.2:*:*:*:*:*:*:*
Vendors & Products Moxa
Moxa moxa Remote Connect Suite Mrc Client
References
Metrics cvssV4_0

{'score': 7.6, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Moxa
Published
Updated
Nov 4, 2026, 3:00 PM
Reserved
Oct 16, 2026, 5:36 AM
Status
Awaiting Analysis
Published
Oct 27, 2026, 8:16 AM
Modified
Nov 4, 2026, 3:17 PM