{"schema":"threatline.record/2","record":{"id":"CVE-2026-8066","aliases":[],"summary":"A directory traversal vulnerability in the file upload functionality of Hitachi Energy RTU500 end-of-life versions allows an unauthenticated attacker to write or overwrite arbitrary files on the devic","details":"A directory traversal vulnerability in the file upload functionality of Hitachi Energy RTU500 end-of-life versions allows an unauthenticated attacker to write or overwrite arbitrary files on the device file system. Depending on the files affected, successful exploitation could result in unauthorized modification of device data or disruption of the device’s intended operation.","categories":["Unclassified"],"product":"RTU500 series CMU firmware","vendor":"Hitachi Energy","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-8066","source_modified_at":"2026-09-29T15:52:33.807Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"RTU500 series CMU firmware","vendor":"Hitachi Energy","versions":[{"status":"affected","version":"9.0","lessThan":"12.0","versionType":"custom"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-8066","source_modified_at":"2026-09-29T15:52:33.807Z","fetched_at":"2026-10-23T18:52:38.922436Z","package":{"name":"RTU500 series CMU firmware","ecosystem":null},"version":"12.0","basis":"first unaffected version stated in the CVE record"}],"cvss":9.1,"severity":"Critical","kev":{"listed":false},"epss":{"probability":0.00736,"percentile":0.53985,"score_date":"2026-10-23"},"published_at":"2026-09-29T09:24:05.830Z","modified_at":"2026-09-29T15:52:33.807Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-8066","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-09-29T15:52:33.807Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-8066","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://publisher.hitachienergy.com/preview?DocumentID=8DBD000251&LanguageCode=en&DocumentPartId=&Action=Launch"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"yes","technical_impact":"partial","assessed_at":"2026-09-29T15:52:09.514722Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-09-29T15:52:33.807Z","content_hash":"266d26f381c73fb3546406be38cc7c3f94faca593e871466700e0aa9dd3445de"}}