CVE-2021-26423 (GCVE-0-2021-26423)

Vulnerability from cvelistv5 – Published: 2021-08-12 18:11 – Updated: 2026-05-28 18:48
VLAI
Title
.NET Core and Visual Studio Denial of Service Vulnerability
Summary
.NET Core and Visual Studio Denial of Service Vulnerability
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
Microsoft Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8) Affected: 15.9.0 , < 15.9.38 (custom)
    cpe:2.3:a:microsoft:visual_studio_2017:*:*:*:*:*:*:*:*
 Create a notification for this product.
Microsoft Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3) Affected: 16.0 , < 16.4.25 (custom)
    cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*
 Create a notification for this product.
Microsoft Microsoft Visual Studio 2019 version 16.7 (includes 16.0 – 16.6) Affected: 16.0.0 , < 16.7.18 (custom)
    cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*
 Create a notification for this product.
Microsoft Microsoft Visual Studio 2019 version 16.9 (includes 16.0 - 16.8) Affected: 15.0.0 , < 16.9.10 (custom)
    cpe:2.3:a:microsoft:visual_studio_2019:16.9:*:*:*:*:*:*:*
 Create a notification for this product.
Microsoft Microsoft Visual Studio 2019 version 16.10 (includes 16.0 - 16.9) Affected: 16.10.0 , < 16.10.5 (custom)
    cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*
 Create a notification for this product.
Microsoft Visual Studio 2019 for Mac version 8.10 Affected: 8.1.0 , < 8.10.7 (custom)
    cpe:2.3:a:microsoft:visual_studio_2019:8.10:*:*:*:*:macos:*:*
 Create a notification for this product.
Microsoft .NET Core 2.1 Affected: 2.1 , < 2.1.30 (custom)
    cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:*
 Create a notification for this product.
Microsoft .NET Core 3.1 Affected: 3.1 , < 3.1.18 (custom)
    cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:*
 Create a notification for this product.
Microsoft .NET 5.0 Affected: 5.0.0 , < 5.0.9 (custom)
    cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*
 Create a notification for this product.
Microsoft PowerShell Core 7.1 Affected: 7.1.0 , < 7.1.4 (custom)
    cpe:2.3:a:microsoft:powershell_core:*:*:*:*:*:*:*:*
 Create a notification for this product.
Microsoft PowerShell Core 7.0 Affected: 7.0.0 , < 7.0.7 (custom)
    cpe:2.3:a:microsoft:powershell_core:*:*:*:*:*:*:*:*
 Create a notification for this product.
Date Public
2021-08-10 07:00
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T20:26:25.161Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26423"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-26423",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-06-04T13:28:43.832819Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "description": "CWE-noinfo Not enough information",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-28T18:48:05.221Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:microsoft:visual_studio_2017:*:*:*:*:*:*:*:*"
          ],
          "platforms": [
            "Unknown"
          ],
          "product": "Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "15.9.38",
              "status": "affected",
              "version": "15.9.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*"
          ],
          "platforms": [
            "Unknown"
          ],
          "product": "Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "16.4.25",
              "status": "affected",
              "version": "16.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*"
          ],
          "platforms": [
            "Unknown"
          ],
          "product": "Microsoft Visual Studio 2019 version 16.7 (includes 16.0 \u2013 16.6)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "16.7.18",
              "status": "affected",
              "version": "16.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:a:microsoft:visual_studio_2019:16.9:*:*:*:*:*:*:*"
          ],
          "platforms": [
            "Unknown"
          ],
          "product": "Microsoft Visual Studio 2019 version 16.9 (includes 16.0 - 16.8)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "16.9.10",
              "status": "affected",
              "version": "15.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*"
          ],
          "platforms": [
            "Unknown"
          ],
          "product": "Microsoft Visual Studio 2019 version 16.10 (includes 16.0 - 16.9)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "16.10.5",
              "status": "affected",
              "version": "16.10.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:a:microsoft:visual_studio_2019:8.10:*:*:*:*:macos:*:*"
          ],
          "platforms": [
            "Unknown"
          ],
          "product": "Visual Studio 2019 for Mac version 8.10",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "8.10.7",
              "status": "affected",
              "version": "8.1.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:*"
          ],
          "platforms": [
            "Unknown"
          ],
          "product": ".NET Core 2.1",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "2.1.30",
              "status": "affected",
              "version": "2.1",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:*"
          ],
          "platforms": [
            "Unknown"
          ],
          "product": ".NET Core 3.1",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "3.1.18",
              "status": "affected",
              "version": "3.1",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*"
          ],
          "platforms": [
            "Unknown"
          ],
          "product": ".NET 5.0",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "5.0.9",
              "status": "affected",
              "version": "5.0.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:a:microsoft:powershell_core:*:*:*:*:*:*:*:*"
          ],
          "platforms": [
            "Unknown"
          ],
          "product": "PowerShell Core 7.1",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "7.1.4",
              "status": "affected",
              "version": "7.1.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:a:microsoft:powershell_core:*:*:*:*:*:*:*:*"
          ],
          "platforms": [
            "Unknown"
          ],
          "product": "PowerShell Core 7.0",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "7.0.7",
              "status": "affected",
              "version": "7.0.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "datePublic": "2021-08-10T07:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": ".NET Core and Visual Studio Denial of Service Vulnerability"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "Denial of Service",
              "lang": "en-US",
              "type": "Impact"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2023-12-28T19:53:54.266Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26423"
        }
      ],
      "title": ".NET Core and Visual Studio Denial of Service Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2021-26423",
    "datePublished": "2021-08-12T18:11:31.000Z",
    "dateReserved": "2021-01-29T00:00:00.000Z",
    "dateUpdated": "2026-05-28T18:48:05.221Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2021-26423",
      "date": "2026-06-04",
      "epss": "0.03366",
      "percentile": "0.87576"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-26423\",\"sourceIdentifier\":\"secure@microsoft.com\",\"published\":\"2021-08-12T18:15:08.537\",\"lastModified\":\"2024-11-21T05:56:21.260\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\".NET Core and Visual Studio Denial of Service Vulnerability\"},{\"lang\":\"es\",\"value\":\"Una Vulnerabilidad de Denegaci\u00f3n de Servicio en .NET Core y Visual Studio\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"secure@microsoft.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":3.6},{\"source\":\"nvd@nist.gov\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":3.6}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:L/Au:N/C:N/I:N/A:P\",\"baseScore\":5.0,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"LOW\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"PARTIAL\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":10.0,\"impactScore\":2.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.0\",\"versionEndIncluding\":\"5.0.8\",\"matchCriteriaId\":\"B85CD4C7-D84B-4C54-A604-FC852038A565\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"2.1\",\"versionEndIncluding\":\"2.1.28\",\"matchCriteriaId\":\"FB624437-CB1B-46A2-BF75-30035D99D2EF\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.1\",\"versionEndIncluding\":\"3.1.17\",\"matchCriteriaId\":\"6F344BDC-2929-4CEA-8414-E4D07C1F76F0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:microsoft:powershell_core:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"7.0\",\"versionEndExcluding\":\"7.0.7\",\"matchCriteriaId\":\"BE4005F4-89BB-4597-9070-1137B4CEFC9B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:microsoft:powershell_core:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"7.1\",\"versionEndExcluding\":\"7.1.4\",\"matchCriteriaId\":\"40F33C0C-7AF0-4B48-828C-00534012D728\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:microsoft:visual_studio_2017:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"15.0\",\"versionEndIncluding\":\"15.9\",\"matchCriteriaId\":\"CE03B37D-72FE-4C25-BE62-9C422AEFC80E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"16.0\",\"versionEndIncluding\":\"16.10\",\"matchCriteriaId\":\"26472C42-CDB4-4176-B10B-3BF26F5030E3\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:microsoft:visual_studio_2019:8.10:*:*:*:*:macos:*:*\",\"matchCriteriaId\":\"BA547FFE-D557-4612-9840-EEE88ACF53AA\"}]}]}],\"references\":[{\"url\":\"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26423\",\"source\":\"secure@microsoft.com\",\"tags\":[\"Patch\",\"Vendor Advisory\"]},{\"url\":\"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26423\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\",\"Vendor Advisory\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26423\", \"tags\": [\"x_refsource_MISC\", \"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-03T20:26:25.161Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-26423\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-06-04T13:28:43.832819Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"description\": \"CWE-noinfo Not enough information\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-06-04T13:28:45.517Z\"}}], \"cna\": {\"title\": \".NET Core and Visual Studio Denial of Service Vulnerability\", \"metrics\": [{\"format\": \"CVSS\", \"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 7.5, \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C\"}, \"scenarios\": [{\"lang\": \"en-US\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"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\": \"15.9.38\", \"versionType\": \"custom\"}], \"platforms\": [\"Unknown\"]}, {\"cpes\": [\"cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*\"], \"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\"}], \"platforms\": [\"Unknown\"]}, {\"cpes\": [\"cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*\"], \"vendor\": \"Microsoft\", \"product\": \"Microsoft Visual Studio 2019 version 16.7 (includes 16.0 \\u2013 16.6)\", \"versions\": [{\"status\": \"affected\", \"version\": \"16.0.0\", \"lessThan\": \"16.7.18\", \"versionType\": \"custom\"}], \"platforms\": [\"Unknown\"]}, {\"cpes\": [\"cpe:2.3:a:microsoft:visual_studio_2019:16.9:*:*:*:*:*:*:*\"], \"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\"}], \"platforms\": [\"Unknown\"]}, {\"cpes\": [\"cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*\"], \"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\"}], \"platforms\": [\"Unknown\"]}, {\"cpes\": [\"cpe:2.3:a:microsoft:visual_studio_2019:8.10:*:*:*:*:macos:*:*\"], \"vendor\": \"Microsoft\", \"product\": \"Visual Studio 2019 for Mac version 8.10\", \"versions\": [{\"status\": \"affected\", \"version\": \"8.1.0\", \"lessThan\": \"8.10.7\", \"versionType\": \"custom\"}], \"platforms\": [\"Unknown\"]}, {\"cpes\": [\"cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:*\"], \"vendor\": \"Microsoft\", \"product\": \".NET Core 2.1\", \"versions\": [{\"status\": \"affected\", \"version\": \"2.1\", \"lessThan\": \"2.1.30\", \"versionType\": \"custom\"}], \"platforms\": [\"Unknown\"]}, {\"cpes\": [\"cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:*\"], \"vendor\": \"Microsoft\", \"product\": \".NET Core 3.1\", \"versions\": [{\"status\": \"affected\", \"version\": \"3.1\", \"lessThan\": \"3.1.18\", \"versionType\": \"custom\"}], \"platforms\": [\"Unknown\"]}, {\"cpes\": [\"cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*\"], \"vendor\": \"Microsoft\", \"product\": \".NET 5.0\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.0.0\", \"lessThan\": \"5.0.9\", \"versionType\": \"custom\"}], \"platforms\": [\"Unknown\"]}, {\"cpes\": [\"cpe:2.3:a:microsoft:powershell_core:*:*:*:*:*:*:*:*\"], \"vendor\": \"Microsoft\", \"product\": \"PowerShell Core 7.1\", \"versions\": [{\"status\": \"affected\", \"version\": \"7.1.0\", \"lessThan\": \"7.1.4\", \"versionType\": \"custom\"}], \"platforms\": [\"Unknown\"]}, {\"cpes\": [\"cpe:2.3:a:microsoft:powershell_core:*:*:*:*:*:*:*:*\"], \"vendor\": \"Microsoft\", \"product\": \"PowerShell Core 7.0\", \"versions\": [{\"status\": \"affected\", \"version\": \"7.0.0\", \"lessThan\": \"7.0.7\", \"versionType\": \"custom\"}], \"platforms\": [\"Unknown\"]}], \"datePublic\": \"2021-08-10T07:00:00.000Z\", \"references\": [{\"url\": \"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26423\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en-US\", \"value\": \".NET Core and Visual Studio Denial of Service Vulnerability\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en-US\", \"type\": \"Impact\", \"description\": \"Denial of Service\"}]}], \"providerMetadata\": {\"orgId\": \"f38d906d-7342-40ea-92c1-6c4a2c6478c8\", \"shortName\": \"microsoft\", \"dateUpdated\": \"2023-12-28T19:53:54.266Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-26423\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-28T18:48:05.221Z\", \"dateReserved\": \"2021-01-29T00:00:00.000Z\", \"assignerOrgId\": \"f38d906d-7342-40ea-92c1-6c4a2c6478c8\", \"datePublished\": \"2021-08-12T18:11:31.000Z\", \"assignerShortName\": \"microsoft\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.