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CVE-2021-33436

Estado: ModificadaAlta (7.3)—

NoMachine for Windows prior to version 6.15.1 and 7.5.2 suffer from local privilege escalation due to the lack of safe DLL loading. This vulnerability allows local non-privileged users to perform DLL Hijacking via any writable directory listed under the system path and ultimately execute code as NT AUTHORITY\SYSTEM.

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)

Nomachine — Nomachine

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2021-33436",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
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        "source": "nvd@nist.gov",
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          "baseScore": 6.2,
          "accessVector": "LOCAL",
          "vectorString": "AV:L/AC:H/Au:N/C:C/I:C/A:C",
          "authentication": "NONE",
          "integrityImpact": "COMPLETE",
          "accessComplexity": "HIGH",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "COMPLETE"
        },
        "acInsufInfo": false,
        "impactScore": 10,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 1.9,
        "obtainUserPrivilege": false,
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          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H",
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          "userInteraction": "REQUIRED",
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          "privilegesRequired": "LOW",
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  "affected": [
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  "published": "2022-04-28T11:15:07.720",
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
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      "description": [
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          "value": "NVD-CWE-noinfo"
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  ],
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      "value": "NoMachine for Windows prior to version 6.15.1 and 7.5.2 suffer from local privilege escalation due to the lack of safe DLL loading. This vulnerability allows local non-privileged users to perform DLL Hijacking via any writable directory listed under the system path and ultimately execute code as NT AUTHORITY\\SYSTEM."
    },
    {
      "lang": "es",
      "value": "NoMachine para Windows versiones anteriores a 6.15.1 y 7.5.2, sufre una escalada de privilegios local debido a una falta de carga segura de DLL. Esta vulnerabilidad permite a usuarios locales no privilegiado llevar a cabo el secuestro de DLL por medio de cualquier directorio con capacidad de escritura que aparezca en la ruta del sistema y, en última instancia, ejecutar código como NT AUTHORITY\\SYSTEM"
    }
  ],
  "lastModified": "2026-06-17T03:54:32.867",
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