{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2021-1424",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-1424",
    "idYear": 2021,
    "status": "PUBLISHED",
    "publishedAt": "2024-11-18T15:35:11.060Z",
    "updatedAt": "2024-11-18T16:18:16.475Z",
    "importedAt": "2026-10-24T01:56:21.187Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "Cisco ASR 5000 Series Software (StarOS)  ipsecmgr Process Denial of Service Vulnerability",
      "summary": "A vulnerability in the ipsecmgr process of Cisco ASR 5000 Series Software (StarOS) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition.\r\nThis vulnerability is due to insufficient validation of incoming Internet Key Exchange Version 2 (IKEv2) packets. An attacker could exploit this vulnerability by sending specifically malformed IKEv2 packets to an affected device. A successful exploit could allow the attacker to cause the ipsecmgr process to restart, which would disrupt ongoing IKE negotiations and result in a temporary DoS condition.Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.",
      "affected": [
        {
          "vendor": "Cisco",
          "product": "Cisco ASR 5000 Series Software",
          "defaultStatus": "unknown",
          "versions": [
            {
              "version": "21.15.7",
              "status": "affected"
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              "version": "21.13.10",
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            {
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              "version": "21.13.8",
              "status": "affected"
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            {
              "version": "21.14.5",
              "status": "affected"
            },
            {
              "version": "21.12.8",
              "status": "affected"
            },
            {
              "version": "21.13.11",
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            },
            {
              "version": "21.11.8",
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            },
            {
              "version": "21.12.9",
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            {
              "version": "21.15.5",
              "status": "affected"
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            {
              "version": "21.11.7",
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            {
              "version": "21.13.5",
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            {
              "version": "21.12.0",
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            {
              "version": "21.15.2",
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            {
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            {
              "version": "21.14.2",
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            {
              "version": "21.12.3",
              "status": "affected"
            },
            {
              "version": "21.15.0",
              "status": "affected"
            },
            {
              "version": "21.11.2",
              "status": "affected"
            },
            {
              "version": "21.13.7",
              "status": "affected"
            },
            {
              "version": "21.12.4",
              "status": "affected"
            },
            {
              "version": "21.12.12",
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            },
            {
              "version": "21.13.4",
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            },
            {
              "version": "21.12.5",
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            {
              "version": "21.14.a0",
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            {
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              "version": "21.11.4",
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            {
              "version": "21.12.7",
              "status": "affected"
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            {
              "version": "21.14.3",
              "status": "affected"
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              "version": "21.14.9",
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            {
              "version": "21.11.1",
              "status": "affected"
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            {
              "version": "21.14.7",
              "status": "affected"
            },
            {
              "version": "21.11.3",
              "status": "affected"
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            {
              "version": "21.13.3",
              "status": "affected"
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            {
              "version": "21.13.2",
              "status": "affected"
            },
            {
              "version": "21.13.14",
              "status": "affected"
            },
            {
              "version": "21.12.1",
              "status": "affected"
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            {
              "version": "21.13.6",
              "status": "affected"
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            {
              "version": "21.13.12",
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            {
              "version": "21.15.27",
              "status": "affected"
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            {
              "version": "21.13.17",
              "status": "affected"
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            {
              "version": "21.18.0",
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            {
              "version": "21.15.28",
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            },
            {
              "version": "21.14.17",
              "status": "affected"
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            {
              "version": "21.16.d1",
              "status": "affected"
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            {
              "version": "21.18.1",
              "status": "affected"
            },
            {
              "version": "21.16.3",
              "status": "affected"
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            {
              "version": "21.14.b18",
              "status": "affected"
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            {
              "version": "21.16.c10",
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              "version": "21.11.11",
              "status": "affected"
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            {
              "version": "21.15.29",
              "status": "affected"
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            {
              "version": "21.15.30",
              "status": "affected"
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            {
              "version": "21.13.18",
              "status": "affected"
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            {
              "version": "21.12.16",
              "status": "affected"
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            {
              "version": "21.17.5",
              "status": "affected"
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            {
              "version": "21.16.c11",
              "status": "affected"
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            {
              "version": "21.15.32",
              "status": "affected"
            },
            {
              "version": "21.13.19",
              "status": "affected"
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              "version": "21.15.33",
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              "version": "21.14.19",
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              "version": "21.17.6",
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              "status": "affected"
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}