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

{
  "id": "edb2a3e3af0fd53d48d100b3664318cee6f6c91fd34b507bf0d2b2663d19d9df",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-111459",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "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 impersonate a trusted server and conduct a man-in-the-middle attack, potentially compromising the confidentiality and integrity of communications.",
    "evidence": "cve:CVE-2026-111459",
    "products": [
      {
        "name": {
          "value": "Moxa Remote Connect Suite (MRC Client)",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-111459",
      "aliases": [
        "CVE-2026-111459"
      ],
      "metrics": [
        {
          "format": "CVSS",
          "cvssV4_0": {
            "Safety": "NOT_DEFINED",
            "version": "4.0",
            "Recovery": "NOT_DEFINED",
            "baseScore": 7.6,
            "Automatable": "NOT_DEFINED",
            "attackVector": "NETWORK",
            "baseSeverity": "HIGH",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "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",
            "exploitMaturity": "NOT_DEFINED",
            "providerUrgency": "NOT_DEFINED",
            "userInteraction": "PASSIVE",
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "privilegesRequired": "NONE",
            "subIntegrityImpact": "NONE",
            "vulnIntegrityImpact": "HIGH",
            "subAvailabilityImpact": "NONE",
            "vulnAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "affected": [
        {
          "vendor": "Moxa",
          "product": "Moxa Remote Connect Suite (MRC Client)",
          "versions": [
            {
              "status": "affected",
              "version": "1.0.0",
              "versionType": "custom",
              "lessThanOrEqual": "4.2.0"
            },
            {
              "status": "unaffected",
              "version": "4.2.2",
              "versionType": "custom"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ],
      "modified": "2026-10-27T07:08:17.598Z",
      "provider": "cve",
      "references": [
        "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"
      ],
      "provider_metadata": {
        "cna": {
          "orgId": "2e0a0ee2-d866-482a-9f5e-ac03d156dbaa",
          "shortName": "Moxa",
          "dateUpdated": "2026-10-27T07:08:17.598Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-111459",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 391518,
  "published_at": "2026-10-27T07:08:17.598+00:00"
}