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CVE-2021-33716

Estado: ModificadaMedia (6.5)—

A vulnerability has been identified in SIMATIC CP 1543-1 (incl. SIPLUS variants) (All versions < V3.0), SIMATIC CP 1545-1 (All versions < V1.1). An attacker with access to the subnet of the affected device could retrieve sensitive information stored in cleartext.

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)

Siemens — Simatic CP 1543-1 FirmwareSiemens — Simatic CP 1545-1 Firmware

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2021-33716",
  "cveTags": [],
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    "cvssMetricV2": [
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        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
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          "baseScore": 3.3,
          "accessVector": "ADJACENT_NETWORK",
          "vectorString": "AV:A/AC:L/Au:N/C:P/I:N/A:N",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "LOW",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 6.5,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
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          "baseScore": 6.5,
          "attackVector": "ADJACENT_NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
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          "confidentialityImpact": "HIGH"
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        "impactScore": 3.6,
        "exploitabilityScore": 2.8
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  "affected": [
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          "vendor": "Siemens",
          "product": "SIMATIC CP 1543-1 (incl. SIPLUS variants)",
          "versions": [
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              "status": "affected",
              "version": "All versions < V3.0"
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          "vendor": "Siemens",
          "product": "SIMATIC CP 1545-1",
          "versions": [
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              "status": "affected",
              "version": "All versions < V1.1"
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  "published": "2021-09-14T11:15:24.347",
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      "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-535997.pdf",
      "tags": [
        "Patch",
        "Vendor Advisory"
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      "source": "productcert@siemens.com"
    },
    {
      "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-535997.pdf",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "productcert@siemens.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-312"
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    },
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
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          "lang": "en",
          "value": "CWE-312"
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      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability has been identified in SIMATIC CP 1543-1 (incl. SIPLUS variants) (All versions < V3.0), SIMATIC CP 1545-1 (All versions < V1.1). An attacker with access to the subnet of the affected device could retrieve sensitive information stored in cleartext."
    },
    {
      "lang": "es",
      "value": "Se ha identificado una vulnerabilidad en SIMATIC CP 1543-1 (incl. variantes SIPLUS) (Todas las versiones anteriores a V3.0), SIMATIC CP 1545-1 (Todas las versiones anteriores a V1.1). Un atacante con acceso a la subred del dispositivo afectado podría recuperar información sensible almacenada en texto claro"
    }
  ],
  "lastModified": "2026-06-17T03:55:05.830",
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