{
  "cveId": "CVE-2021-1721",
  "url": "https://patchblox.com/security/cve/CVE-2021-1721",
  "summary": "CVE-2021-1721 is fixed in 23 products on 1 platform, first by RHSA-2021:0471, released February 10, 2021. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": ".NET Core and Visual Studio Denial of Service Vulnerability",
  "description": ".NET is a managed-software framework. It implements a subset of the .NET\nframework APIs and several new APIs, and it includes a CLR implementation.\n\nNew versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 5.0.103 and .NET Runtime 5.0.3.\n\nSecurity Fix(es):\n\n* dotnet: certificate chain building recursion Denial of Service (CVE-2021-1721)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
  "published": "2021-02-09T14:00:00Z",
  "severity": "Important",
  "cvss": 6.5,
  "epss": 0.0334,
  "epssPercentile": 0.88737,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": true,
  "exploitabilityAssessment": "Exploitation Less Likely",
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-1721",
  "fixes": [
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      "released": "2021-02-10T00:00:00Z"
    },
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      "released": "2021-02-11T00:00:00Z"
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  "noFixYet": [],
  "dataAsOf": "2026-11-09T07:25:28Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
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}