{
  "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-2021-24042",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-24042",
    "idYear": 2021,
    "status": "PUBLISHED",
    "publishedAt": "2022-01-04T18:55:08.000Z",
    "updatedAt": "2025-05-22T18:36:53.143Z",
    "importedAt": "2026-10-24T01:56:26.894Z",
    "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": null,
      "summary": "The calling logic for WhatsApp for Android prior to v2.21.23, WhatsApp Business for Android prior to v2.21.23, WhatsApp for iOS prior to v2.21.230, WhatsApp Business for iOS prior to v2.21.230, WhatsApp for KaiOS prior to v2.2143, WhatsApp Desktop prior to v2.2146 could have allowed an out-of-bounds write if a user makes a 1:1 call to a malicious actor.",
      "affected": [
        {
          "vendor": "Facebook",
          "product": "WhatsApp Desktop",
          "versions": [
            {
              "version": "unspecified",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "v2.2146"
            },
            {
              "version": "v2.2146",
              "status": "unaffected",
              "versionType": "custom",
              "lessThan": "unspecified"
            }
          ]
        },
        {
          "vendor": "Facebook",
          "product": "WhatsApp for KaiOS",
          "versions": [
            {
              "version": "unspecified",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "v2.2143"
            },
            {
              "version": "v2.2143",
              "status": "unaffected",
              "versionType": "custom",
              "lessThan": "unspecified"
            }
          ]
        },
        {
          "vendor": "Facebook",
          "product": "WhatsApp Business for iOS",
          "versions": [
            {
              "version": "unspecified",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "v2.21.230"
            },
            {
              "version": "v2.21.230",
              "status": "unaffected",
              "versionType": "custom",
              "lessThan": "unspecified"
            }
          ]
        },
        {
          "vendor": "Facebook",
          "product": "WhatsApp for iOS",
          "versions": [
            {
              "version": "unspecified",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "v2.21.230"
            },
            {
              "version": "v2.21.230",
              "status": "unaffected",
              "versionType": "custom",
              "lessThan": "unspecified"
            }
          ]
        },
        {
          "vendor": "Facebook",
          "product": "WhatsApp Business for Android",
          "versions": [
            {
              "version": "unspecified",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "v2.21.23"
            },
            {
              "version": "v2.21.23",
              "status": "unaffected",
              "versionType": "custom",
              "lessThan": "unspecified"
            }
          ]
        },
        {
          "vendor": "Facebook",
          "product": "WhatsApp for Android",
          "versions": [
            {
              "version": "unspecified",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "v2.21.23"
            },
            {
              "version": "v2.21.23",
              "status": "unaffected",
              "versionType": "custom",
              "lessThan": "unspecified"
            }
          ]
        }
      ]
    }
  }
}