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CVE-2021-1721

Estado: ModificadaMedia (6.5)—

.NET Core and Visual Studio Denial of Service Vulnerability

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 (5)

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2021-1721",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-1721",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2024-01-03T18:38:54.615731Z"
        }
      }
    ],
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 4.3,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "secure@microsoft.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6.5,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.8
      },
      {
        "type": "Secondary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
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          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
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      "source": "secure@microsoft.com",
      "affectedData": [
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          ],
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          "product": "Microsoft Visual Studio 2019 version 16.7 (includes 16.0 – 16.6)",
          "versions": [
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              "version": "16.0.0",
              "lessThan": "publication",
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          "platforms": [
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        },
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          "vendor": "Microsoft",
          "product": "PowerShell Core 7.1",
          "versions": [
            {
              "status": "affected",
              "version": "7.1.0",
              "lessThan": "publication",
              "versionType": "custom"
            }
          ],
          "platforms": [
            "Unknown"
          ]
        },
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          "product": "PowerShell Core 7.0",
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          ],
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          ]
        },
        {
          "cpes": [
            "cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:*"
          ],
          "vendor": "Microsoft",
          "product": ".NET Core 2.1",
          "versions": [
            {
              "status": "affected",
              "version": "2.1",
              "lessThan": "publication",
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            }
          ],
          "platforms": [
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        },
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          "vendor": "Microsoft",
          "product": ".NET Core 3.1",
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              "version": "3.1",
              "lessThan": "publication",
              "versionType": "custom"
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          ],
          "platforms": [
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          ]
        },
        {
          "cpes": [
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          ],
          "vendor": "Microsoft",
          "product": ".NET 5.0",
          "versions": [
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              "status": "affected",
              "version": "5.0.0",
              "lessThan": "publication",
              "versionType": "custom"
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          ],
          "platforms": [
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        },
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          ],
          "vendor": "Microsoft",
          "product": "Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3)",
          "versions": [
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              "version": "16.0",
              "lessThan": "publication",
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            }
          ],
          "platforms": [
            "Unknown"
          ]
        },
        {
          "cpes": [
            "cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*"
          ],
          "vendor": "Microsoft",
          "product": "Microsoft Visual Studio 2019 version 16.8",
          "versions": [
            {
              "status": "affected",
              "version": "16.0",
              "lessThan": "publication",
              "versionType": "custom"
            }
          ],
          "platforms": [
            "Unknown"
          ]
        },
        {
          "cpes": [
            "cpe:2.3:a:microsoft:visual_studio_2017:*:*:*:*:*:*:*:*"
          ],
          "vendor": "Microsoft",
          "product": "Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8)",
          "versions": [
            {
              "status": "affected",
              "version": "15.9.0",
              "lessThan": "publication",
              "versionType": "custom"
            }
          ],
          "platforms": [
            "Unknown"
          ]
        }
      ]
    }
  ],
  "published": "2021-02-25T23:15:13.210",
  "references": [
    {
      "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1721",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "secure@microsoft.com"
    },
    {
      "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1721",
      "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": ".NET Core and Visual Studio Denial of Service Vulnerability"
    },
    {
      "lang": "es",
      "value": "Una Vulnerabilidad de Denegación de Servicio de .NET Core y Visual Studio"
    }
  ],
  "lastModified": "2026-06-17T03:32:26.200",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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          "operator": "OR"
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  ],
  "sourceIdentifier": "secure@microsoft.com"
}