{"containers": {"cna": {"title": ".NET Core and Visual Studio Denial of Service Vulnerability", "datePublic": "2021-02-09T08:00:00.000Z", "affected": [{"vendor": "Microsoft", "product": "Microsoft Visual Studio 2019 version 16.7 (includes 16.0 \u2013 16.6)", "cpes": ["cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*"], "platforms": ["Unknown"], "versions": [{"version": "16.0.0", "lessThan": "publication", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "PowerShell Core 7.1", "cpes": ["cpe:2.3:a:microsoft:powershell_core:*:*:*:*:*:*:*:*"], "platforms": ["Unknown"], "versions": [{"version": "7.1.0", "lessThan": "publication", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "PowerShell Core 7.0", "cpes": ["cpe:2.3:a:microsoft:powershell_core:*:*:*:*:*:*:*:*"], "platforms": ["Unknown"], "versions": [{"version": "7.0.0", "lessThan": "publication", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": ".NET Core 2.1", "cpes": ["cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:*"], "platforms": ["Unknown"], "versions": [{"version": "2.1", "lessThan": "publication", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": ".NET Core 3.1", "cpes": ["cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:*"], "platforms": ["Unknown"], "versions": [{"version": "3.1", "lessThan": "publication", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": ".NET 5.0", "cpes": ["cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*"], "platforms": ["Unknown"], "versions": [{"version": "5.0.0", "lessThan": "publication", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3)", "cpes": ["cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*"], "platforms": ["Unknown"], "versions": [{"version": "16.0", "lessThan": "publication", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Microsoft Visual Studio 2019 version 16.8", "cpes": ["cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*"], "platforms": ["Unknown"], "versions": [{"version": "16.0", "lessThan": "publication", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8)", "cpes": ["cpe:2.3:a:microsoft:visual_studio_2017:*:*:*:*:*:*:*:*"], "platforms": ["Unknown"], "versions": [{"version": "15.9.0", "lessThan": "publication", "versionType": "custom", "status": "affected"}]}], "descriptions": [{"value": ".NET Core and Visual Studio Denial of Service Vulnerability", "lang": "en-US"}], "problemTypes": [{"descriptions": [{"description": "Denial of Service", "lang": "en-US", "type": "Impact"}]}], "providerMetadata": {"orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8", "shortName": "microsoft", "dateUpdated": "2023-12-29T22:33:17.653Z"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1721"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en-US", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "baseSeverity": "MEDIUM", "baseScore": 6.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C"}}]}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T16:18:11.551Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1721"}]}, {"problemTypes": [{"descriptions": [{"type": "CWE", "lang": "en", "description": "CWE-noinfo Not enough information"}]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2024-01-03T18:38:54.615731Z", "id": "CVE-2021-1721", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-28T19:30:20.892Z"}}]}, "cveMetadata": {"assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8", "assignerShortName": "microsoft", "cveId": "CVE-2021-1721", "datePublished": "2021-02-25T23:01:26.000Z", "dateReserved": "2020-12-02T00:00:00.000Z", "dateUpdated": "2026-05-28T19:30:20.892Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.2"}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1721", "tags": ["x_refsource_MISC", "x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T16:18:11.551Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2021-1721", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-01-03T18:38:54.615731Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "description": "CWE-noinfo Not enough information"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-28T19:27:15.823Z"}}], "cna": {"title": ".NET Core and Visual Studio Denial of Service Vulnerability", "metrics": [{"format": "CVSS", "cvssV3_1": {"version": "3.1", "baseScore": 6.5, "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C"}, "scenarios": [{"lang": "en-US", "value": "GENERAL"}]}], "affected": [{"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": "publication", "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": "publication", "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": "publication", "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": "publication", "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": "publication", "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": "publication", "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": "publication", "versionType": "custom"}], "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"]}], "datePublic": "2021-02-09T08:00:00.000Z", "references": [{"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1721", "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": "2023-12-29T22:33:17.653Z"}}}, "cveMetadata": {"cveId": "CVE-2021-1721", "state": "PUBLISHED", "dateUpdated": "2026-05-28T19:30:20.892Z", "dateReserved": "2020-12-02T00:00:00.000Z", "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8", "datePublished": "2021-02-25T23:01:26.000Z", "assignerShortName": "microsoft"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"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": "publication", "status": "affected", "version": "16.0.0", "versionType": "custom"}]}, {"cpes": ["cpe:2.3:a:microsoft:powershell_core:*:*:*:*:*:*:*:*"], "platforms": ["Unknown"], "product": "PowerShell Core 7.1", "vendor": "Microsoft", "versions": [{"lessThan": "publication", "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": "publication", "status": "affected", "version": "7.0.0", "versionType": "custom"}]}, {"cpes": ["cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:*"], "platforms": ["Unknown"], "product": ".NET Core 2.1", "vendor": "Microsoft", "versions": [{"lessThan": "publication", "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": "publication", "status": "affected", "version": "3.1", "versionType": "custom"}]}, {"cpes": ["cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*"], "platforms": ["Unknown"], "product": ".NET 5.0", "vendor": "Microsoft", "versions": [{"lessThan": "publication", "status": "affected", "version": "5.0.0", "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": "publication", "status": "affected", "version": "16.0", "versionType": "custom"}]}, {"cpes": ["cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*"], "platforms": ["Unknown"], "product": "Microsoft Visual Studio 2019 version 16.8", "vendor": "Microsoft", "versions": [{"lessThan": "publication", "status": "affected", "version": "16.0", "versionType": "custom"}]}, {"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": "publication", "status": "affected", "version": "15.9.0", "versionType": "custom"}]}], "source": "secure@microsoft.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*", "matchCriteriaId": "8797E7EA-A66B-4B9C-AA2A-DAB08A8A16DB", "versionEndIncluding": "5.0.2", "versionStartIncluding": "5.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:*", "matchCriteriaId": "7C5D87DA-378D-4457-986B-8A0796ED00EB", "versionEndIncluding": "2.1.24", "versionStartIncluding": "2.1", "vulnerable": true}, {"criteria": "cpe:2.3:a:microsoft:.net_core:*:*:*:*:*:*:*:*", "matchCriteriaId": "1B672ED7-CB65-4D0E-AD4B-4508C4FA8C92", "versionEndIncluding": "3.1.11", "versionStartIncluding": "3.1", "vulnerable": true}, {"criteria": "cpe:2.3:a:microsoft:powershell_core:7.0:*:*:*:*:*:*:*", "matchCriteriaId": "6A812D8D-C6DA-473E-A604-988BCDA26CDD", "vulnerable": true}, {"criteria": "cpe:2.3:a:microsoft:powershell_core:7.1:*:*:*:*:*:*:*", "matchCriteriaId": "AAFBD34E-F04C-4B1B-AFD4-0D926BC30609", "vulnerable": true}, {"criteria": "cpe:2.3:a:microsoft:visual_studio_2017:*:*:*:*:*:*:*:*", "matchCriteriaId": "CE03B37D-72FE-4C25-BE62-9C422AEFC80E", "versionEndIncluding": "15.9", "versionStartIncluding": "15.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*", "matchCriteriaId": "FD824DE6-3564-4B7D-B45C-2EEE1F84C9D2", "versionEndIncluding": "16.8", "versionStartIncluding": "16.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": ".NET Core and Visual Studio Denial of Service Vulnerability"}, {"lang": "es", "value": "Una Vulnerabilidad de Denegaci\u00f3n de Servicio de .NET Core y Visual Studio"}], "id": "CVE-2021-1721", "lastModified": "2026-06-17T03:32:26.200", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 4.3, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": true}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "secure@microsoft.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2021-1721", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-01-03T18:38:54.615731Z", "version": "2.0.3"}}]}, "published": "2021-02-25T23:15:13.210", "references": [{"source": "secure@microsoft.com", "tags": ["Patch", "Vendor Advisory"], "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1721"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Vendor Advisory"], "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1721"}], "sourceIdentifier": "secure@microsoft.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2021:0470", "cpe": "cpe:/a:redhat:rhel_dotnet:2.1::el7", "package": "rh-dotnet21-0:2.1-24.el7_9", "product_name": ".NET Core on Red Hat Enterprise Linux", "release_date": "2021-02-10T00:00:00Z"}, {"advisory": "RHSA-2021:0470", "cpe": "cpe:/a:redhat:rhel_dotnet:2.1::el7", "package": "rh-dotnet21-dotnet-0:2.1.521-1.el7_9", "product_name": ".NET Core on Red Hat Enterprise Linux", "release_date": "2021-02-10T00:00:00Z"}, {"advisory": "RHSA-2021:0472", "cpe": "cpe:/a:redhat:rhel_dotnet:3.1::el7", "package": "rh-dotnet31-dotnet-0:3.1.112-1.el7_9", "product_name": ".NET Core on Red Hat Enterprise Linux", "release_date": "2021-02-10T00:00:00Z"}, {"advisory": "RHSA-2021:0473", "cpe": "cpe:/a:redhat:rhel_dotnet:5.0::el7", "package": "rh-dotnet50-dotnet-0:5.0.103-1.el7_9", "product_name": ".NET Core on Red Hat Enterprise Linux", "release_date": "2021-02-10T00:00:00Z"}, {"advisory": "RHSA-2021:0471", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "dotnet3.1-0:3.1.112-1.el8_3", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2021-02-10T00:00:00Z"}, {"advisory": "RHSA-2021:0474", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "dotnet-0:2.1.521-1.el8_3", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2021-02-10T00:00:00Z"}, {"advisory": "RHSA-2021:0476", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "dotnet5.0-0:5.0.103-1.el8_3", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2021-02-10T00:00:00Z"}], "bugzilla": {"description": "dotnet: certificate chain building recursion Denial of Service", "id": "1926918", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1926918"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "status": "verified"}, "cwe": "CWE-674", "details": [".NET Core and Visual Studio Denial of Service Vulnerability", "A flaw was found in dotnet. A recursion error when building X.509 certificate chains can lead to a stack overflow which could crash the system. The highest threat from this vulnerability is to system availability."], "name": "CVE-2021-1721", "public_date": "2021-02-09T18:52:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-1721\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-1721\nhttps://github.com/dotnet/announcements/issues/175\nhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-1721"], "threat_severity": "Important"}

{}