{"id":"CVE-2026-8479","state":"PUBLISHED","title":"IEC 60870-5-104 used in bidirectional mode in RTU500 is vulnerable","description":"IEC 60870-5-104 used in bidirectional mode in RTU500 is vulnerable\nfor a NULL pointer dereferencing, if a specially crafted\nsequence of messages is sent for a certain time, causing\nDenial of Service impact.\nProduct is only affected if IEC 60870-5-104 functionality in\nbidirectional mode (BCI) is configured.","publishedAt":"2026-05-26T11:54:09.962Z","updatedAt":"2026-05-26T14:49:40.036Z","severity":{"score":6.9,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","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","versionType":"custom"}]}],"references":["https://publisher.hitachienergy.com/preview?DocumentID=8DBD000252&LanguageCode=en&DocumentPartId=&Action=Launch"],"weaknesses":["CWE-476"],"ingestedAt":"2026-10-29T20:13:26.108Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/8xxx/CVE-2026-8479.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-8479","state":"PUBLISHED","datePublished":"2026-05-26T11:54:09.962Z","dateUpdated":"2026-05-26T14:49:40.036Z","assignerShortName":"Hitachi Energy","assignerOrgId":"e383dce4-0c27-4495-91c4-0db157728d17","dateReserved":"2026-05-13T13:42:53.588Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"IEC 60870-5-104 used in bidirectional mode in RTU500 is vulnerable\nfor a NULL pointer dereferencing, if a specially crafted\nsequence of messages is sent for a certain time, causing\nDenial of Service impact.\nProduct is only affected if IEC 60870-5-104 functionality in\nbidirectional mode (BCI) is configured."}],"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","versionType":"custom"}]}],"references":[{"url":"https://publisher.hitachienergy.com/preview?DocumentID=8DBD000252&LanguageCode=en&DocumentPartId=&Action=Launch"}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"ADJACENT","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","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":"MEDIUM","baseScore":6.9,"vectorString":"CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}}],"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":"2026-05-26T14:49:40.036Z"},"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 0.5.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-26T14:30:56.474198Z","id":"CVE-2026-8479","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":"2026-05-26T14:42:00.978Z"}}]}}}