« Volver al listado

CVE-2021-26423

Estado: ModificadaAlta (7.5)—

.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-2021-26423",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-26423",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-06-04T13:28:43.832819Z"
        }
      }
    ],
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "secure@microsoft.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      },
      {
        "type": "Secondary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "secure@microsoft.com",
      "affectedData": [
        {
          "vendor": "Microsoft",
          "product": ".NET 5.0",
          "versions": [
            {
              "status": "affected",
              "version": "5.0.0",
              "lessThan": "5.0.9",
              "versionType": "custom"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": ".NET Core 2.1",
          "versions": [
            {
              "status": "affected",
              "version": "2.1",
              "lessThan": "2.1.30",
              "versionType": "custom"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": ".NET Core 3.1",
          "versions": [
            {
              "status": "affected",
              "version": "3.1",
              "lessThan": "3.1.18",
              "versionType": "custom"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8)",
          "versions": [
            {
              "status": "affected",
              "version": "15.9.0",
              "lessThan": "15.9.38",
              "versionType": "custom"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Microsoft Visual Studio 2019 version 16.10 (includes 16.0 - 16.9)",
          "versions": [
            {
              "status": "affected",
              "version": "16.10.0",
              "lessThan": "16.10.5",
              "versionType": "custom"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3)",
          "versions": [
            {
              "status": "affected",
              "version": "16.0",
              "lessThan": "16.4.25",
              "versionType": "custom"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Microsoft Visual Studio 2019 version 16.7 (includes 16.0 – 16.6)",
          "versions": [
            {
              "status": "affected",
              "version": "16.0.0",
              "lessThan": "16.7.18",
              "versionType": "custom"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Microsoft Visual Studio 2019 version 16.9 (includes 16.0 - 16.8)",
          "versions": [
            {
              "status": "affected",
              "version": "15.0.0",
              "lessThan": "16.9.10",
              "versionType": "custom"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "PowerShell Core 7.0",
          "versions": [
            {
              "status": "affected",
              "version": "7.0.0",
              "lessThan": "7.0.7",
              "versionType": "custom"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "PowerShell Core 7.1",
          "versions": [
            {
              "status": "affected",
              "version": "7.1.0",
              "lessThan": "7.1.4",
              "versionType": "custom"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Visual Studio 2019 for Mac version 8.10",
          "versions": [
            {
              "status": "affected",
              "version": "8.1.0",
              "lessThan": "8.10.7",
              "versionType": "custom"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-08-12T18:15:08.537",
  "references": [
    {
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26423",
      "source": "secure@microsoft.com"
    },
    {
      "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26423",
      "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 en .NET Core y Visual Studio"
    }
  ],
  "lastModified": "2026-08-10T16:17:31.570",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B85CD4C7-D84B-4C54-A604-FC852038A565",
              "versionEndIncluding": "5.0.8",
              "versionStartIncluding": "5.0"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "FB624437-CB1B-46A2-BF75-30035D99D2EF",
              "versionEndIncluding": "2.1.28",
              "versionStartIncluding": "2.1"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "6F344BDC-2929-4CEA-8414-E4D07C1F76F0",
              "versionEndIncluding": "3.1.17",
              "versionStartIncluding": "3.1"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:powershell_core:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "BE4005F4-89BB-4597-9070-1137B4CEFC9B",
              "versionEndExcluding": "7.0.7",
              "versionStartIncluding": "7.0"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:powershell_core:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "40F33C0C-7AF0-4B48-828C-00534012D728",
              "versionEndExcluding": "7.1.4",
              "versionStartIncluding": "7.1"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:visual_studio_2017:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "CE03B37D-72FE-4C25-BE62-9C422AEFC80E",
              "versionEndIncluding": "15.9",
              "versionStartIncluding": "15.0"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "26472C42-CDB4-4176-B10B-3BF26F5030E3",
              "versionEndIncluding": "16.10",
              "versionStartIncluding": "16.0"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:visual_studio_2019:8.10:*:*:*:*:macos:*:*",
              "vulnerable": true,
              "matchCriteriaId": "BA547FFE-D557-4612-9840-EEE88ACF53AA"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "secure@microsoft.com"
}