{"id":"CVE-2026-1773","state":"PUBLISHED","title":"IEC 60870-5-104 used in RTU500: Potential Denial of Service impact on reception of invalid U-format frame. Product is only affected if IEC 60870-5-104 bi-directional functionality ","description":"IEC 60870-5-104 used in RTU500: Potential Denial of Service impact on reception of invalid U-format frame. Product is only affected if IEC 60870-5-104 bi-directional functionality is configured. Enabling secure communication following IEC 62351-3 does not remediate the vulnerability but mitigates the risk of exploitation.","publishedAt":"2026-02-24T13:13:17.990Z","updatedAt":"2026-05-27T14:50:01.447Z","severity":{"score":8.7,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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":"13.6.2","versionType":"custom"},{"version":"13.7.1","status":"affected","lessThanOrEqual":"13.7.7","versionType":"custom"},{"version":"13.8.1","status":"affected","versionType":"custom"}]}],"references":["https://publisher.hitachienergy.com/preview?DocumentID=8DBD000237&LanguageCode=en&DocumentPartId=&Action=Launch"],"weaknesses":["CWE-184"],"ingestedAt":"2026-10-29T20:11:10.572Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/1xxx/CVE-2026-1773.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-1773","state":"PUBLISHED","datePublished":"2026-02-24T13:13:17.990Z","dateUpdated":"2026-05-27T14:50:01.447Z","assignerShortName":"Hitachi Energy","assignerOrgId":"e383dce4-0c27-4495-91c4-0db157728d17","dateReserved":"2026-02-02T16:28:59.394Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"IEC 60870-5-104 used in RTU500: Potential Denial of Service impact on reception of invalid U-format frame. Product is only affected if IEC 60870-5-104 bi-directional functionality is configured. Enabling secure communication following IEC 62351-3 does not remediate the vulnerability but mitigates the risk of exploitation."}],"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":"13.6.2","versionType":"custom"},{"version":"13.7.1","status":"affected","lessThanOrEqual":"13.7.7","versionType":"custom"},{"version":"13.8.1","status":"affected","versionType":"custom"}]}],"references":[{"url":"https://publisher.hitachienergy.com/preview?DocumentID=8DBD000237&LanguageCode=en&DocumentPartId=&Action=Launch"}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","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":"HIGH","baseScore":8.7,"vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-184","lang":"en","description":"CWE-184 Incomplete List of Disallowed Inputs","type":"CWE"}]}],"providerMetadata":{"shortName":"Hitachi Energy","orgId":"e383dce4-0c27-4495-91c4-0db157728d17","dateUpdated":"2026-05-26T14:53:41.970Z"},"impacts":[{"capecId":"CAPEC-278","descriptions":[{"lang":"en","value":"CAPEC-278 Web Services Protocol Manipulation"}]}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 0.5.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-02-28T02:19:44.432868Z","id":"CVE-2026-1773","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-05-27T14:50:01.447Z"}}]}}}