{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-4769", "assignerOrgId": "270ccfa6-a436-4e77-922e-914ec3a9685c", "state": "PUBLISHED", "assignerShortName": "CERTVDE", "dateReserved": "2026-03-24T13:19:36.714Z", "datePublished": "2026-07-13T06:35:01.116Z", "dateUpdated": "2026-07-13T06:35:01.116Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "0765-110x/0100-0000", "vendor": "WAGO", "versions": [{"lessThan": "1.2.1.100", "status": "affected", "version": "1.0.0.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "0765-120x/0100-0000", "vendor": "WAGO", "versions": [{"lessThan": "1.2.7.100", "status": "affected", "version": "1.0.0.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "0765-150x/0100-0000", "vendor": "WAGO", "versions": [{"lessThan": "1.2.7.103", "status": "affected", "version": "1.0.0.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "0765-2101/0100-0000", "vendor": "WAGO", "versions": [{"lessThan": "1.2.1.102", "status": "affected", "version": "1.0.0.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "0765-2102/0100-0000", "vendor": "WAGO", "versions": [{"lessThan": "1.2.5.101", "status": "affected", "version": "1.0.0.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "0765-410x/0100-0000", "vendor": "WAGO", "versions": [{"lessThan": "1.2.1.100", "status": "affected", "version": "1.0.0.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "0765-420x/0100-0000", "vendor": "WAGO", "versions": [{"lessThan": "1.2.7.100", "status": "affected", "version": "1.0.0.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "0765-450x/0100-0000", "vendor": "WAGO", "versions": [{"lessThan": "1.2.7.103", "status": "affected", "version": "1.0.0.0", "versionType": "semver"}]}], "cpeApplicability": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:wago:field_profinet:*:*:*:*:*:*:*:*", "versionEndExcluding": "1.2.1.100", "versionStartIncluding": "1.0.0.0", "vulnerable": true}], "negate": false, "operator": "OR"}], "operator": "OR"}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:wago:field_profinet:1.2.1.0:*:*:*:*:*:*:*", "versionEndExcluding": "1.2.7.100", "versionStartIncluding": "1.0.0.0", "vulnerable": true}], "negate": false, "operator": "OR"}], "operator": "OR"}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:wago:field_profinet:1.2.1.0:*:*:*:*:*:*:*", "versionEndExcluding": "1.2.7.103", "versionStartIncluding": "1.0.0.0", "vulnerable": true}], "negate": false, "operator": "OR"}], "operator": "OR"}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:wago:field_profinet:1.2.1.0:*:*:*:*:*:*:*", "versionEndExcluding": "1.2.1.102", "versionStartIncluding": "1.0.0.0", "vulnerable": true}], "negate": false, "operator": "OR"}], "operator": "OR"}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:wago:field_profinet:1.2.1.0:*:*:*:*:*:*:*", "versionEndExcluding": "1.2.5.101", "versionStartIncluding": "1.0.0.0", "vulnerable": true}], "negate": false, "operator": "OR"}], "operator": "OR"}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:wago:field_profinet:*:*:*:*:*:*:*:*", "versionEndExcluding": "1.2.1.100", "versionStartIncluding": "1.0.0.0", "vulnerable": true}], "negate": false, "operator": "OR"}], "operator": "OR"}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:wago:field_profinet:1.2.1.0:*:*:*:*:*:*:*", "versionEndExcluding": "1.2.7.100", "versionStartIncluding": "1.0.0.0", "vulnerable": true}], "negate": false, "operator": "OR"}], "operator": "OR"}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:wago:field_profinet:1.2.1.0:*:*:*:*:*:*:*", "versionEndExcluding": "1.2.7.103", "versionStartIncluding": "1.0.0.0", "vulnerable": true}], "negate": false, "operator": "OR"}], "operator": "OR"}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>Certain devices in the WAGO System I/O Field series activate an internal diagnostic capability during the initial startup sequence. This functionality is not formally documented and becomes accessible without authentication for a brief period in the early boot phase. During this window, an unauthenticated remote attacker can gain access to the internal system processes, resulting in full system compromise.</p>"}], "value": "Certain devices in the WAGO System I/O Field series activate an internal diagnostic capability during the initial startup sequence. This functionality is not formally documented and becomes accessible without authentication for a brief period in the early boot phase. During this window, an unauthenticated remote attacker can gain access to the internal system processes, resulting in full system compromise."}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "baseScore": 9.3, "baseSeverity": "CRITICAL", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}, {"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-912", "description": "CWE-912 Hidden Functionality", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "270ccfa6-a436-4e77-922e-914ec3a9685c", "shortName": "CERTVDE", "dateUpdated": "2026-07-13T06:35:01.116Z"}, "references": [{"url": "https://www.certvde.com/en/advisories/VDE-2026-031/"}], "source": {"advisory": "VDE-2026-031", "defect": ["CERT@VDE#641997"], "discovery": "UNKNOWN"}, "title": "Unauthenticated Access to Internal Diagnostic Interface", "x_generator": {"engine": "Vulnogram 0.4.0"}}}}

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