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CVE-2019-8258

Estado: ModificadaCrítica (9.8)—

UltraVNC revision 1198 has a heap buffer overflow vulnerability in VNC client code which results code execution. This attack appears to be exploitable via network connectivity. This vulnerability has been fixed in revision 1199.

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 (4)

Siemens — Sinumerik Access Mymachine/p2pSiemens — Sinumerik PCU Base Win10 Software/ipcSiemens — Sinumerik PCU Base Win7 Software/ipcUvnc — Ultravnc

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2019-8258",
  "cveTags": [],
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          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
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        "acInsufInfo": false,
        "impactScore": 6.4,
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
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          "confidentialityImpact": "HIGH"
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  "affected": [
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      "affectedData": [
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          "vendor": "UltraVNC",
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          "versions": [
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  "published": "2019-03-05T15:29:00.320",
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "description": [
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      "source": "nvd@nist.gov",
      "description": [
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          "lang": "en",
          "value": "CWE-787"
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      "lang": "en",
      "value": "UltraVNC revision 1198 has a heap buffer overflow vulnerability in VNC client code which results code execution. This attack appears to be exploitable via network connectivity. This vulnerability has been fixed in revision 1199."
    },
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      "lang": "es",
      "value": "UltraVNC, en su revisión 1198, tiene una vulnerabilidad de desbordamiento de búfer de memoria dinámica (heap) en el código del cliente VNC, lo que resulta en la ejecución de código. Este ataque parece ser explotable mediante la conectividad de red. Esto se ha solucionado en la revisión 1199."
    }
  ],
  "lastModified": "2026-06-17T02:41:45.827",
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