{
  "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-2021-40828",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-40828",
    "idYear": 2021,
    "status": "PUBLISHED",
    "publishedAt": "2021-11-22T23:41:16.000Z",
    "updatedAt": "2024-08-04T02:51:06.830Z",
    "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": "TLS hostname validation issues within AWS IoT Device SDKs on Windows",
      "summary": "Connections initialized by the AWS IoT Device SDK v2 for Java (versions prior to 1.3.3), Python (versions prior to 1.5.18), C++ (versions prior to 1.12.7) and Node.js (versions prior to 1.5.1) did not verify server certificate hostname during TLS handshake when overriding Certificate Authorities (CA) in their trust stores on Windows. This issue has been addressed in aws-c-io submodule versions 0.9.13 onward. This issue affects: Amazon Web Services AWS IoT Device SDK v2 for Java versions prior to 1.3.3 on Microsoft Windows. Amazon Web Services AWS IoT Device SDK v2 for Python versions prior to 1.5.18 on Microsoft Windows. Amazon Web Services AWS IoT Device SDK v2 for C++ versions prior to 1.12.7 on Microsoft Windows. Amazon Web Services AWS IoT Device SDK v2 for Node.js versions prior to 1.5.3 on Microsoft Windows.",
      "affected": [
        {
          "vendor": "Amazon Web Services",
          "product": "AWS IoT Device SDK v2 for Java",
          "platforms": [
            "Microsoft Windows"
          ],
          "versions": [
            {
              "version": "unspecified",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "1.3.3"
            }
          ]
        },
        {
          "vendor": "Amazon Web Services",
          "product": "AWS IoT Device SDK v2 for Python",
          "platforms": [
            "Microsoft Windows"
          ],
          "versions": [
            {
              "version": "unspecified",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "1.5.18"
            }
          ]
        },
        {
          "vendor": "Amazon Web Services",
          "product": "AWS IoT Device SDK v2 for C++",
          "platforms": [
            "Microsoft Windows"
          ],
          "versions": [
            {
              "version": "unspecified",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "1.12.7"
            }
          ]
        },
        {
          "vendor": "Amazon Web Services",
          "product": "AWS IoT Device SDK v2 for Node.js",
          "platforms": [
            "Microsoft Windows"
          ],
          "versions": [
            {
              "version": "unspecified",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "1.5.3"
            }
          ]
        },
        {
          "vendor": "Amazon Web Services",
          "product": "AWS-C-IO",
          "platforms": [
            "Microsoft Windows"
          ],
          "versions": [
            {
              "version": "0.9.12",
              "status": "affected"
            }
          ]
        }
      ]
    }
  }
}