{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-84235", "assignerOrgId": "b73dd486-f505-4403-b634-40b078b177f0", "state": "PUBLISHED", "assignerShortName": "Rockwell", "dateReserved": "2026-09-01T12:56:28.970Z", "datePublished": "2026-09-01T13:07:28.779Z", "dateUpdated": "2026-09-01T13:07:28.779Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "b73dd486-f505-4403-b634-40b078b177f0", "shortName": "Rockwell", "dateUpdated": "2026-09-01T13:07:28.779Z"}, "title": "Rockwell Automation 1756-ENBT Denial of Service Vulnerability", "affected": [{"vendor": "Rockwell Automation", "product": "1756-ENBT Module", "versions": [{"status": "affected", "version": "All versions"}], "defaultStatus": "unaffected"}], "cpeApplicability": [{"operator": "OR", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:rockwell_automation:1756-enbt_module:all_versions:*:*:*:*:*:*:*"}]}]}], "descriptions": [{"lang": "en", "value": "A denial-of-service security issue exists in the affected product. The security issue stems from a crafted CIP packet being sent crashing the module. The device requires a restart to recover.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "A denial-of-service security issue exists in the affected product. The security issue stems from a crafted CIP packet being sent crashing the module. The device requires a restart to recover."}]}], "references": [{"url": "https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1798.html"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "HIGH", "baseScore": 8.7, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}}], "solutions": [{"lang": "en", "value": "Upgrade to 1756-EN2T or\n\n\n\n1756-EN4TR", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>Upgrade to 1756-EN2T or</p><p>1756-EN4TR</p>"}]}], "source": {"advisory": "SD1798", "discovery": "EXTERNAL"}, "x_generator": {"engine": "Vulnogram 1.0.5"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "1756-ENBT Module", "vendor": "Rockwell Automation", "versions": [{"status": "affected", "version": "All versions"}]}], "source": "PSIRT@rockwellautomation.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A denial-of-service security issue exists in the affected product. The security issue stems from a crafted CIP packet being sent crashing the module. The device requires a restart to recover."}], "id": "CVE-2026-84235", "lastModified": "2026-09-01T13:20:09.563", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.7, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "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:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "PSIRT@rockwellautomation.com", "type": "Secondary"}]}, "published": "2026-09-01T13:20:09.563", "references": [{"source": "PSIRT@rockwellautomation.com", "url": "https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1798.html"}], "sourceIdentifier": "PSIRT@rockwellautomation.com", "vulnStatus": "Received"}

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