{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-41020", "assignerOrgId": "63703b7d-23e2-41ef-94b3-a3c6333f7759", "state": "PUBLISHED", "assignerShortName": "Eaton", "dateReserved": "2026-04-16T05:27:09.485Z", "datePublished": "2026-10-27T11:05:51.545Z", "dateUpdated": "2026-10-27T11:05:51.545Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "63703b7d-23e2-41ef-94b3-a3c6333f7759", "shortName": "Eaton", "dateUpdated": "2026-10-27T11:05:51.545Z"}, "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-294", "description": "CWE-294 Authentication bypass by capture-replay", "type": "CWE"}]}], "affected": [{"vendor": "Eaton", "product": "easyE4", "versions": [{"status": "affected", "version": "0", "lessThan": "2.46", "versionType": "custom"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "Eaton easyE4 uses a static nonce during authentication, which could allow an unauthenticated attacker with access to captured authentication traffic to replay a valid authentication exchange and gain unauthorized access to the device.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<div>Eaton easyE4 uses a static nonce during authentication, which could allow an unauthenticated attacker with access to captured authentication traffic to replay a valid authentication exchange and gain unauthorized access to the device.</div>"}]}], "references": [{"url": "https://www.eaton.com/content/dam/eaton/company/news-insights/cybersecurity/security-bulletins/eaton-va-2026-1017.pdf", "tags": ["vendor-advisory"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseSeverity": "HIGH", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"}}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 1.0.5"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "easyE4", "vendor": "Eaton", "versions": [{"lessThan": "2.46", "status": "affected", "version": "0", "versionType": "custom"}]}], "source": "CybersecurityCOE@eaton.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Eaton easyE4 uses a static nonce during authentication, which could allow an unauthenticated attacker with access to captured authentication traffic to replay a valid authentication exchange and gain unauthorized access to the device."}], "id": "CVE-2026-41020", "lastModified": "2026-10-27T12:17:07.670", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.6, "impactScore": 5.9, "source": "CybersecurityCOE@eaton.com", "type": "Secondary"}]}, "published": "2026-10-27T12:17:07.670", "references": [{"source": "CybersecurityCOE@eaton.com", "url": "https://www.eaton.com/content/dam/eaton/company/news-insights/cybersecurity/security-bulletins/eaton-va-2026-1017.pdf"}], "sourceIdentifier": "CybersecurityCOE@eaton.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-294"}], "source": "CybersecurityCOE@eaton.com", "type": "Secondary"}]}

{}

{"created": "2026-10-27T14:00:05.447286+00:00", "title": "Replay Attack via Static Nonce in Eaton easyE4 Authentication", "updated": "2026-10-27T14:00:05.447299+00:00", "vendors": []}