{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-17539","assignerOrgId":"e383dce4-0c27-4495-91c4-0db157728d17","state":"PUBLISHED","assignerShortName":"Hitachi Energy","dateReserved":"2026-07-27T09:46:09.631Z","datePublished":"2026-09-03T07:59:47.162Z","dateUpdated":"2026-09-03T12:48:06.779Z"},"containers":{"cna":{"providerMetadata":{"orgId":"e383dce4-0c27-4495-91c4-0db157728d17","shortName":"Hitachi Energy","dateUpdated":"2026-09-03T07:59:47.162Z"},"problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-476","description":"CWE-476 NULL pointer dereference","type":"CWE"}]}],"impacts":[{"capecId":"CAPEC-679","descriptions":[{"lang":"en","value":"CAPEC-679 Exploitation of Improperly Configured or Implemented Memory Protections"}]}],"affected":[{"vendor":"Hitachi Energy","product":"RTU500 series CMU firmware","versions":[{"status":"affected","version":"12.7.1","lessThanOrEqual":"12.7.7","versionType":"custom"},{"status":"affected","version":"13.5.1","lessThanOrEqual":"13.5.4","versionType":"custom"},{"status":"affected","version":"13.6.1","lessThanOrEqual":"13.6.3","versionType":"custom"},{"status":"affected","version":"13.7.1","lessThanOrEqual":"13.7.8","versionType":"custom"},{"status":"affected","version":"13.8.1","lessThanOrEqual":"13.8.2","versionType":"custom"}],"defaultStatus":"unaffected"}],"descriptions":[{"lang":"en","value":"RTU500 has a vulnerability, where high-load scenarios, such as sending GI requests at short intervals, may cause a NULL pointer dereference in the last entry of the enhanced message queue. This can cause a BCI_IEC104 fatal write error, resulting in connection interruption and restart, and ultimately a denial of service for bidirectional IEC 60870-5-104 communication.","supportingMedia":[{"type":"text/html","base64":false,"value":"RTU500 has a vulnerability, where high-load scenarios, such as sending GI requests at short intervals, may cause a NULL pointer dereference in the last entry of the enhanced message queue. This can cause a BCI_IEC104 fatal write error, resulting in connection interruption and restart, and ultimately a denial of service for bidirectional IEC 60870-5-104 communication.<br>"}]}],"references":[{"url":"https://publisher.hitachienergy.com/preview?DocumentID=8DBD000259&LanguageCode=en&DocumentPartId=&Action=Launch"}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseSeverity":"MEDIUM","baseScore":5.9,"vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"}}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 0.5.0"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-03T12:47:58.284424Z","id":"CVE-2026-17539","options":[{"Exploitation":"none"},{"Automatable":"no"},{"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":"2026-09-03T12:48:06.779Z"}}]}}