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CVE-2021-33719

Estado: ModificadaCrítica (9.8)—

A vulnerability has been identified in SIPROTEC 5 relays with CPU variants CP050 (All versions < V8.80), SIPROTEC 5 relays with CPU variants CP100 (All versions < V8.80), SIPROTEC 5 relays with CPU variants CP300 (All versions < V8.80). Specially crafted packets sent to port 4443/tcp could cause a Denial-of-Service condition or potential remote code execution.

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 (3)

Siemens — Siprotec 5 With CPU Variant Cp050Siemens — Siprotec 5 With CPU Variant Cp100Siemens — Siprotec 5 With CPU Variant Cp300

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-33719",
  "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": "productcert@siemens.com",
      "affectedData": [
        {
          "vendor": "Siemens",
          "product": "SIPROTEC 5 relays with CPU variants CP050",
          "versions": [
            {
              "status": "affected",
              "version": "All versions < V8.80"
            }
          ]
        },
        {
          "vendor": "Siemens",
          "product": "SIPROTEC 5 relays with CPU variants CP100",
          "versions": [
            {
              "status": "affected",
              "version": "All versions < V8.80"
            }
          ]
        },
        {
          "vendor": "Siemens",
          "product": "SIPROTEC 5 relays with CPU variants CP300",
          "versions": [
            {
              "status": "affected",
              "version": "All versions < V8.80"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-09-14T11:15:24.447",
  "references": [
    {
      "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-847986.pdf",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "productcert@siemens.com"
    },
    {
      "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-847986.pdf",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "productcert@siemens.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-120"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability has been identified in SIPROTEC 5 relays with CPU variants CP050 (All versions < V8.80), SIPROTEC 5 relays with CPU variants CP100 (All versions < V8.80), SIPROTEC 5 relays with CPU variants CP300 (All versions < V8.80). Specially crafted packets sent to port 4443/tcp could cause a Denial-of-Service condition or potential remote code execution."
    },
    {
      "lang": "es",
      "value": "Se ha identificado una vulnerabilidad en los relés SIPROTEC 5 con variantes de CPU CP050 (Todas las versiones anteriores a V8.80), relés SIPROTEC 5 con variantes de CPU CP100 (Todas las versiones anteriores a V8.80), relés SIPROTEC 5 con variantes de CPU CP300 (Todas las versiones anteriores a V8.80). Los paquetes especialmente diseñados enviados al puerto 4443/tcp podrían causar una condición de denegación de servicio o una potencial ejecución de código remota"
    }
  ],
  "lastModified": "2026-06-17T03:55:06.140",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:siemens:siprotec_5_with_cpu_variant_cp050:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "9755644C-32A9-468D-A7AD-D12B8C1924D9",
              "versionEndExcluding": "8.80"
            },
            {
              "criteria": "cpe:2.3:o:siemens:siprotec_5_with_cpu_variant_cp100:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "27B5603D-CA86-440D-9CBE-A6F50AA1ADE1",
              "versionEndExcluding": "8.80"
            },
            {
              "criteria": "cpe:2.3:o:siemens:siprotec_5_with_cpu_variant_cp300:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "23382FCC-10D8-4DEC-A6B1-9B39D8988299",
              "versionEndExcluding": "8.80"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "productcert@siemens.com"
}