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CVE-2021-37206

Estado: ModificadaAlta (7.5)—

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). Received webpackets are not properly processed. An unauthenticated remote attacker with access to any of the Ethernet interfaces could send specially crafted packets to force a restart of the target device.

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)

Mostrar
{
  "id": "CVE-2021-37206",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "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": "2021-09-14T11:15:26.547",
  "references": [
    {
      "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-500748.pdf",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "productcert@siemens.com"
    },
    {
      "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-500748.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-20"
        }
      ]
    }
  ],
  "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). Received webpackets are not properly processed. An unauthenticated remote attacker with access to any of the Ethernet interfaces could send specially crafted packets to force a restart of the target device."
    },
    {
      "lang": "es",
      "value": "Se ha identificado una vulnerabilidad en los relés SIPROTEC 5 con variantes de CPUCP050 (Todas las versiones anteriores a V8.80), relés SIPROTEC 5 con variantes de CPUCP100 (Todas las versiones anteriores a V8.80), relés SIPROTEC 5 con variantes de CPUCP300 (Todas las versiones anteriores a V8.80). Los paquetes web recibidos no se procesan correctamente. Un atacante remoto no autenticado con acceso a cualquiera de las interfaces Ethernet podría enviar paquetes especialmente diseñados para forzar el reinicio del dispositivo de destino"
    }
  ],
  "lastModified": "2026-06-17T04:00:16.097",
  "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"
}