CVE-2021-24042 json
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…
published 2022-01-04 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-10959
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.3%
- EPSS 1.3% chance of exploitation in 30 days, percentile 70%
- public exploits
- 0
- none known
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.
Patch / fix
- Facebook WhatsApp Desktop v2.2146
- Facebook WhatsApp for KaiOS v2.2143
- Facebook WhatsApp Business for iOS v2.21.230
- Facebook WhatsApp for iOS v2.21.230
- Facebook WhatsApp Business for Android v2.21.23
- Facebook WhatsApp for Android v2.21.23
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 17 mo ago
Exploit prediction
1.28% chance of exploitation in the next 30 days, higher than 70% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
Affected products
- Facebook WhatsApp Desktop
- Facebook WhatsApp for KaiOS
- Facebook WhatsApp Business for iOS
- Facebook WhatsApp for iOS
- Facebook WhatsApp Business for Android
- Facebook WhatsApp for Android
Classification
References
-
whatsapp.com
/security/advisories/2021/
not-applicable, vendor-advisory
Sources
- CVE List CVE-2021-24042
- NVD CVE-2021-24042
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.