CVE-2026-1773 (GCVE-0-2026-1773)

Vulnerability from cvelistv5 – Published: 2026-02-24 13:13 – Updated: 2026-02-24 13:40
VLAI?
Summary
IEC 60870-5-104: 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.
Severity ?
8.7 (High)
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
CWE
  • CWE-184 - Incomplete List of Disallowed Inputs
Assigner
References
Impacted products
Vendor Product Version
Hitachi Energy RTU500 series CMU firmware Affected: 12.7.1 , ≤ 12.7.7 (custom)
Affected: 13.5.1 , ≤ 13.5.4 (custom)
Affected: 13.6.1 , ≤ 13.6.2 (custom)
Affected: 13.7.1 , ≤ 13.7.7 (custom)
Affected: 13.8.1 (custom)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "RTU500 series CMU firmware",
          "vendor": "Hitachi Energy",
          "versions": [
            {
              "lessThanOrEqual": "12.7.7",
              "status": "affected",
              "version": "12.7.1",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "13.5.4",
              "status": "affected",
              "version": "13.5.1",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "13.6.2",
              "status": "affected",
              "version": "13.6.1",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "13.7.7",
              "status": "affected",
              "version": "13.7.1",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "13.8.1",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "IEC 60870-5-104: Potential Denial of Service impact on reception of invalid U-format frame.\u0026nbsp;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.\u003cbr\u003e"
            }
          ],
          "value": "IEC 60870-5-104: Potential Denial of Service impact on reception of invalid U-format frame.\u00a0Product 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."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-278",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-278 Web Services Protocol Manipulation"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "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",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-184",
              "description": "CWE-184 Incomplete List of Disallowed Inputs",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-24T13:40:55.104Z",
        "orgId": "e383dce4-0c27-4495-91c4-0db157728d17",
        "shortName": "Hitachi Energy"
      },
      "references": [
        {
          "url": "https://publisher.hitachienergy.com/preview?DocumentID=8DBD000237\u0026LanguageCode=en\u0026DocumentPartId=\u0026Action=Launch"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "x_generator": {
        "engine": "Vulnogram 0.5.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "e383dce4-0c27-4495-91c4-0db157728d17",
    "assignerShortName": "Hitachi Energy",
    "cveId": "CVE-2026-1773",
    "datePublished": "2026-02-24T13:13:17.990Z",
    "dateReserved": "2026-02-02T16:28:59.394Z",
    "dateUpdated": "2026-02-24T13:40:55.104Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.