{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-8065","assignerOrgId":"e383dce4-0c27-4495-91c4-0db157728d17","state":"PUBLISHED","assignerShortName":"Hitachi Energy","dateReserved":"2026-05-07T05:51:56.353Z","datePublished":"2026-09-29T09:20:07.276Z","dateUpdated":"2026-09-29T15:54:11.550Z"},"containers":{"cna":{"providerMetadata":{"orgId":"e383dce4-0c27-4495-91c4-0db157728d17","shortName":"Hitachi Energy","dateUpdated":"2026-09-29T12:50:06.355Z"},"problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-306","description":"CWE-306 Missing authentication for critical function","type":"CWE"}]}],"impacts":[{"capecId":"CAPEC-638","descriptions":[{"lang":"en","value":"CAPEC-638 Altered Component Firmware"}]}],"affected":[{"vendor":"Hitachi Energy","product":"RTU500 series CMU firmware","versions":[{"status":"affected","version":"9.0","lessThan":"12.0","versionType":"custom"}],"defaultStatus":"unaffected"}],"descriptions":[{"lang":"en","value":"An authentication bypass vulnerability in the firmware update endpoint of Hitachi Energy RTU500 end-of-life versions allows an unauthenticated attacker to upload arbitrary firmware through a crafted POST request. Successful exploitation could allow the attacker to modify device functionality or compromise the integrity or availability of the device.","supportingMedia":[{"type":"text/html","base64":false,"value":"An authentication bypass vulnerability in the firmware update endpoint of Hitachi Energy RTU500 end-of-life versions allows an unauthenticated attacker to upload arbitrary firmware through a crafted POST request. Successful exploitation could allow the attacker to modify device functionality or compromise the integrity or availability of the device."}]}],"references":[{"url":"https://publisher.hitachienergy.com/preview?DocumentID=8DBD000251&LanguageCode=en&DocumentPartId=&Action=Launch"}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseSeverity":"CRITICAL","baseScore":9.1,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H"}}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 0.5.0"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-29T15:53:38.135052Z","id":"CVE-2026-8065","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-29T15:54:11.550Z"}}]}}