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CVE-2020-1066

Estado: ModificadaAlta (7.8)—

An elevation of privilege vulnerability exists in .NET Framework which could allow an attacker to elevate their privilege level. To exploit the vulnerability, an attacker would first have to access the local machine, and then run a malicious program. The update addresses the vulnerability by correcting how .NET Framework activates COM objects.

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)

Microsoft — .net Framework

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2020-1066",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 4.6,
          "accessVector": "LOCAL",
          "vectorString": "AV:L/AC:L/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 3.9,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
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          "version": "3.1",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
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        "impactScore": 5.9,
        "exploitabilityScore": 1.8
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  "affected": [
    {
      "source": "secure@microsoft.com",
      "affectedData": [
        {
          "vendor": "Microsoft",
          "product": "Microsoft .NET Framework 3.0 Service Pack 2",
          "versions": [
            {
              "status": "affected",
              "version": "3.0.0",
              "lessThan": "publication",
              "versionType": "custom"
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          ],
          "platforms": [
            "Windows Server 2008 for 32-bit Systems Service Pack 2",
            "Windows Server 2008 for x64-based Systems Service Pack 2"
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Microsoft .NET Framework 3.5.1",
          "versions": [
            {
              "status": "affected",
              "version": "3.5.0",
              "lessThan": "publication",
              "versionType": "custom"
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          ],
          "platforms": [
            "Windows 7 for 32-bit Systems Service Pack 1",
            "Windows 7 for x64-based Systems Service Pack 1",
            "Windows Server 2008 R2 for x64-based Systems Service Pack 1",
            "Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)"
          ]
        }
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    }
  ],
  "published": "2020-05-21T23:15:12.757",
  "references": [
    {
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1066",
      "source": "secure@microsoft.com"
    },
    {
      "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1066",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "An elevation of privilege vulnerability exists in .NET Framework which could allow an attacker to elevate their privilege level.\nTo exploit the vulnerability, an attacker would first have to access the local machine, and then run a malicious program.\nThe update addresses the vulnerability by correcting how .NET Framework activates COM objects."
    },
    {
      "lang": "es",
      "value": "Se presenta una vulnerabilidad de elevación de privilegios en .NET Framework que podría permitir a un atacante elevar su nivel de privilegios. Para explotar la vulnerabilidad, un atacante primero tendría que acceder a la máquina local y luego ejecutar un programa malicioso. La actualización aborda la vulnerabilidad al corregir la forma como .NET Framework activa los objetos COM., también se conoce como \".NET Framework Elevation of Privilege Vulnerability\"."
    }
  ],
  "lastModified": "2026-08-19T17:17:12.430",
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