CVE-2021-24026

9.8 criticalEPSS 1.4%

Critical (9.8) in whatsapp. EPSS 1.4% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 1.4% chance of exploitation in the next 30 days; higher than 72% of CVEs (scores of 2026-10-31)
CWE: CWE-787
Published: 2021-04-06
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

whatsapp:whatsapp
whatsapp:whatsapp_business

References

https://www.whatsapp.com/security/advisories/2021/
https://www.whatsapp.com/security/advisories/2021/

Check your stack JSON