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CVE record · CVE-2021-24042

Heap-based buffer overflow in Facebook WhatsApp Desktop and others

CVSS 9.8 CriticalCriticalEPSS 0.013 · 70th percentile

Critical, because:

  • CVSS score 9.8: 9.0 or more.

How we decide what’s critical

Published by the CVE Program (CNA: facebook) at 4 Jan 2022, 18:55 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
Facebook WhatsApp Desktop
  • affected unspecified to before v2.2146 custom
  • unaffected v2.2146 to before unspecified custom
Facebook WhatsApp for KaiOS
  • affected unspecified to before v2.2143 custom
  • unaffected v2.2143 to before unspecified custom
Facebook WhatsApp Business for iOS
  • affected unspecified to before v2.21.230 custom
  • unaffected v2.21.230 to before unspecified custom
Facebook WhatsApp for iOS
  • affected unspecified to before v2.21.230 custom
  • unaffected v2.21.230 to before unspecified custom
Facebook WhatsApp Business for Android
  • affected unspecified to before v2.21.23 custom
  • unaffected v2.21.23 to before unspecified custom
Facebook WhatsApp for Android
  • affected unspecified to before v2.21.23 custom
  • unaffected v2.21.23 to before unspecified custom
Identifiers
CVE-2021-24042
CNA
facebook
Weakness (CWE)
CWE-122 · CWE-787
Tags
Published
4 Jan 2022
Updated
22 May 2025

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
9.8 Critical 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H ADP (CISA-ADP)
  • CISA KEV Not listed.
  • EPSS 0.013, the 70th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 4 Jan 2022. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.