CVE-2021-24026 json
A missing bounds check within the audio decoding pipeline for WhatsApp calls in WhatsApp for Android prior to v2.21.3, WhatsApp Business fo…
published 2021-04-06 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-10946
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.4%
- EPSS 1.4% chance of exploitation in 30 days, percentile 72%
- public exploits
- 0
- none known
Summary
A missing bounds check within the audio decoding pipeline for WhatsApp calls in WhatsApp for Android prior to v2.21.3, WhatsApp Business for Android prior to v2.21.3, WhatsApp for iOS prior to v2.21.32, and WhatsApp Business for iOS prior to v2.21.32 could have allowed an out-of-bounds write.
Patch / fix
- Facebook WhatsApp Business for iOS v2.21.32
- Facebook WhatsApp for iOS v2.21.32
- Facebook WhatsApp Business for Android v2.21.3
- Facebook WhatsApp for Android v2.21.3
Exploit prediction
1.40% chance of exploitation in the next 30 days, higher than 72% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 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 | 10.0 | AV:N/AC:L/Au:N/C:C/I:C/A:C |
Affected products
- Facebook WhatsApp Business for iOS
- Facebook WhatsApp for iOS
- Facebook WhatsApp Business for Android
- Facebook WhatsApp for Android
Classification
- Weakness
-
- CWE-787 Out-of-bounds Write
References
-
whatsapp.com
/security/advisories/2021/
vendor-advisory
Sources
- CVE List CVE-2021-24026
- NVD CVE-2021-24026
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