{"id":"CVE-2026-17539","state":"PUBLISHED","title":"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 messag","description":"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.","publishedAt":"2026-09-03T07:59:47.162Z","updatedAt":"2026-09-03T12:48:06.779Z","severity":{"score":5.9,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"Hitachi Energy"},"assigner":"Hitachi Energy","products":["Hitachi Energy RTU500 series CMU firmware"],"affected":[{"vendor":"Hitachi Energy","product":"RTU500 series CMU firmware","defaultStatus":"unaffected","versions":[{"version":"12.7.1","status":"affected","lessThanOrEqual":"12.7.7","versionType":"custom"},{"version":"13.5.1","status":"affected","lessThanOrEqual":"13.5.4","versionType":"custom"},{"version":"13.6.1","status":"affected","lessThanOrEqual":"13.6.3","versionType":"custom"},{"version":"13.7.1","status":"affected","lessThanOrEqual":"13.7.8","versionType":"custom"},{"version":"13.8.1","status":"affected","lessThanOrEqual":"13.8.2","versionType":"custom"}]}],"references":["https://publisher.hitachienergy.com/preview?DocumentID=8DBD000259&LanguageCode=en&DocumentPartId=&Action=Launch"],"weaknesses":["CWE-476"],"ingestedAt":"2026-10-29T20:11:00.674Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/17xxx/CVE-2026-17539.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-17539","state":"PUBLISHED","datePublished":"2026-09-03T07:59:47.162Z","dateUpdated":"2026-09-03T12:48:06.779Z","assignerShortName":"Hitachi Energy","assignerOrgId":"e383dce4-0c27-4495-91c4-0db157728d17","dateReserved":"2026-07-27T09:46:09.631Z"},"containers":{"cna":{"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."}],"affected":[{"vendor":"Hitachi Energy","product":"RTU500 series CMU firmware","defaultStatus":"unaffected","versions":[{"version":"12.7.1","status":"affected","lessThanOrEqual":"12.7.7","versionType":"custom"},{"version":"13.5.1","status":"affected","lessThanOrEqual":"13.5.4","versionType":"custom"},{"version":"13.6.1","status":"affected","lessThanOrEqual":"13.6.3","versionType":"custom"},{"version":"13.7.1","status":"affected","lessThanOrEqual":"13.7.8","versionType":"custom"},{"version":"13.8.1","status":"affected","lessThanOrEqual":"13.8.2","versionType":"custom"}]}],"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-476","lang":"en","description":"CWE-476 NULL pointer dereference","type":"CWE"}]}],"providerMetadata":{"shortName":"Hitachi Energy","orgId":"e383dce4-0c27-4495-91c4-0db157728d17","dateUpdated":"2026-09-03T07:59:47.162Z"},"impacts":[{"capecId":"CAPEC-679","descriptions":[{"lang":"en","value":"CAPEC-679 Exploitation of Improperly Configured or Implemented Memory Protections"}]}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 0.5.0"}},"adp":[{"title":"CISA ADP Vulnrichment","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"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-03T12:48:06.779Z"}}]}}}