{
  "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-2021-42306",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-42306",
    "idYear": 2021,
    "status": "PUBLISHED",
    "publishedAt": "2021-11-24T01:05:13.000Z",
    "updatedAt": "2026-08-19T16:27:27.220Z",
    "importedAt": "2026-10-24T01:56:32.228Z",
    "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": "Azure Active Directory Information Disclosure Vulnerability",
      "summary": "An information disclosure vulnerability manifests when a user or an application uploads unprotected private key data as part of an authentication certificate keyCredential  on an Azure AD Application or Service Principal (which is not recommended). This vulnerability allows a user or service in the tenant with application read access to read the private key data that was added to the application.\nAzure AD addressed this vulnerability by preventing disclosure of any private key values added to the application.\nMicrosoft has identified services that could manifest this vulnerability, and steps that customers should take to be protected. Refer to the FAQ section for more information.\nFor more details on this issue, please refer to the MSRC Blog Entry.",
      "affected": [
        {
          "vendor": "Microsoft",
          "product": "Azure Active Directory",
          "versions": [
            {
              "version": "-",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Azure Automation",
          "versions": [
            {
              "version": "1.0.0",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "publication"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Azure Migrate",
          "versions": [
            {
              "version": "-",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Azure Site Recovery",
          "versions": [
            {
              "version": "-",
              "status": "affected"
            }
          ]
        }
      ]
    }
  }
}