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CVE-2021-27734

Estado: ModificadaCrítica (9.8)—

Hirschmann HiOS 07.1.01, 07.1.02, and 08.1.00 through 08.5.xx and HiSecOS 03.3.00 through 03.5.01 allow remote attackers to change the credentials of existing users.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (2)

Belden — Hirschmann HiosBelden — Hisecos

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-27734",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 7.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-05-17T15:15:07.700",
  "references": [
    {
      "url": "https://dam.belden.com/dmm3bwsv3/assetstream.aspx?assetid=12914&mediaformatid=50063&destinationid=10016",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://dam.belden.com/dmm3bwsv3/assetstream.aspx?assetid=12914&mediaformatid=50063&destinationid=10016",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-287"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Hirschmann HiOS 07.1.01, 07.1.02, and 08.1.00 through 08.5.xx and HiSecOS 03.3.00 through 03.5.01 allow remote attackers to change the credentials of existing users."
    },
    {
      "lang": "es",
      "value": "Hirschmann HiOS versiones 07.1.01, 07.1.02 y versiones 08.1.00 hasta 08.5.xx y HiSecOS versiones 03.3.00 hasta 03.5.01, permiten a atacantes remotos cambiar las credenciales de los usuarios existentes"
    }
  ],
  "lastModified": "2026-06-17T03:45:23.203",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:belden:hirschmann_hios:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A767C0A4-2042-4394-9179-28002013B2BA",
              "versionEndExcluding": "08.6.00",
              "versionStartIncluding": "08.1.00"
            },
            {
              "criteria": "cpe:2.3:o:belden:hirschmann_hios:07.1.01:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "D0E681A0-6E69-4A14-B7D8-AA4FEB5BFA25"
            },
            {
              "criteria": "cpe:2.3:o:belden:hirschmann_hios:07.1.02:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "7C0BA45B-A4F2-4F6E-925E-BF050046B5DD"
            },
            {
              "criteria": "cpe:2.3:o:belden:hisecos:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "AB3A9A32-97D5-4210-8592-EA292A70D03E",
              "versionEndIncluding": "03.5.01",
              "versionStartIncluding": "03.3.00"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}