High · CVSS 7.6CVE-2026-111459

Unauthenticated server-supplied OpenVPN configuration in Moxa Remote Connect Suite (MRC Client)CVE-2026-111459

Answer in brief

CVE-2026-111459 records a High severity (CVSS 7.6) vulnerability in Unauthenticated server-supplied OpenVPN configuration in Moxa Remote Connect Suite (MRC Client). The current sources do not mark it as known exploited. The current feed maps Moxa/Moxa Remote Connect Suite (MRC Client) (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 27, 2026Updated Oct 27, 2026Source checked Oct 27, 2026First seen by HOL Oct 27, 2026Material review Oct 27, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.6
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 7.6. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Moxa/Moxa Remote Connect Suite (MRC Client) (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Moxa/Moxa Remote Connect Suite (MRC Client)generic	>=1.0.0 <=4.2.0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Moxa/Moxa Remote Connect Suite (MRC Client).
Review the reported fix. Source-reported 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

Evidence timeline and material changes

Published upstream
Oct 27, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 27, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 27, 2026

Sources and claim methodology

Source referencemoxa.com

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.