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CVE-2020-22552

Estado: ModificadaAlta (7.5)—

The Snap7 server component in version 1.4.1, when an attacker sends a crafted packet with COTP protocol the last-data-unit flag set to No and S7 writes a var function, the Snap7 server will be crashed.

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 (1)

Snap7 Project — Snap7

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2020-22552",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
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        "source": "nvd@nist.gov",
        "cvssData": {
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          "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"
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        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
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    "cvssMetricV31": [
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  "affected": [
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      "affectedData": [
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  "published": "2020-10-28T14:15:12.253",
  "references": [
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "value": "The Snap7 server component in version 1.4.1, when an attacker sends a crafted packet with COTP protocol the last-data-unit flag set to No and S7 writes a var function, the Snap7 server will be crashed."
    },
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      "value": "El componente Snap7 server en versión 1.4.1, cuando un atacante envía un paquete diseñado con el flag last-data-unitel del protocolo COTP establece que No y S7 escribe una función var, el servidor de Snap7 se bloqueará"
    }
  ],
  "lastModified": "2026-07-09T00:16:58.137",
  "configurations": [
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