{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-8479", "assignerOrgId": "e383dce4-0c27-4495-91c4-0db157728d17", "state": "PUBLISHED", "assignerShortName": "Hitachi Energy", "dateReserved": "2026-05-13T13:42:53.588Z", "datePublished": "2026-05-26T11:54:09.962Z", "dateUpdated": "2026-05-26T14:49:40.036Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "e383dce4-0c27-4495-91c4-0db157728d17", "shortName": "Hitachi Energy", "dateUpdated": "2026-05-26T14:49:40.036Z"}, "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-476", "description": "CWE-476 NULL pointer dereference", "type": "CWE"}]}], "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", "versionType": "custom"}], "defaultStatus": "unaffected"}], "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.", "supportingMedia": [{"type": "text/html", "base64": false, "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.\n\n<br>"}]}], "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"}}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 0.5.0"}}, "adp": [{"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"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-26T14:42:00.978Z"}}]}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "IEC 60870-5-104 used in bidirectional mode 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."}], "id": "CVE-2026-8479", "lastModified": "2026-05-26T14:16:41.247", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "ADJACENT", "availabilityRequirement": "NOT_DEFINED", "baseScore": 6.9, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "cybersecurity@hitachienergy.com", "type": "Secondary"}]}, "published": "2026-05-26T14:16:41.247", "references": [{"source": "cybersecurity@hitachienergy.com", "url": "https://publisher.hitachienergy.com/preview?DocumentID=8DBD000252&LanguageCode=en&DocumentPartId=&Action=Launch"}], "sourceIdentifier": "cybersecurity@hitachienergy.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "cybersecurity@hitachienergy.com", "type": "Primary"}]}

{}

{}