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CVE-2021-42056

Estado: ModificadaMedia (6.7)—💥 PoC

Thales Safenet Authentication Client (SAC) for Linux and Windows through 10.7.7 creates insecure temporary hid and lock files allowing a local attacker, through a symlink attack, to overwrite arbitrary files, and potentially achieve arbitrary command execution with high privileges.

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).

💥 Exploits públicos

Hay código de explotación o plantillas de detección públicos. No es lo mismo que explotación activa confirmada (KEV), pero aumenta el riesgo: parchee con prioridad.

⚠️ Las pruebas de concepto de GitHub no están verificadas: algunas son falsas o contienen malware. No las ejecute nunca fuera de un laboratorio aislado.

Tecnologías afectadas (1)

Thalesgroup — Safenet Authentication Client

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-42056",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
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          "baseScore": 7.2,
          "accessVector": "LOCAL",
          "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C",
          "authentication": "NONE",
          "integrityImpact": "COMPLETE",
          "accessComplexity": "LOW",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "COMPLETE"
        },
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  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
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              "status": "affected",
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  "vulnStatus": "Modified",
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          "lang": "en",
          "value": "CWE-59"
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  "descriptions": [
    {
      "lang": "en",
      "value": "Thales Safenet Authentication Client (SAC) for Linux and Windows through 10.7.7 creates insecure temporary hid and lock files allowing a local attacker, through a symlink attack, to overwrite arbitrary files, and potentially achieve arbitrary command execution with high privileges."
    },
    {
      "lang": "es",
      "value": "Thales Safenet Authentication Client (SAC) para Linux y Windows versiones hasta 10.7.7, crea archivos temporales de ocultación y bloqueo no seguros que permiten a un atacante local, mediante un ataque de enlace simbólico, sobrescribir archivos arbitrarios, y potencialmente lograr una ejecución de comandos arbitrarios con altos privilegios"
    }
  ],
  "lastModified": "2026-06-17T04:09:14.190",
  "configurations": [
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}