CVE-2021-24026: WhatsApp

Critical severity, CVSS 9.8. 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.

Affected products

• WhatsApp WhatsApp: before 2.21.3 (fixed in 2.21.3)
• WhatsApp WhatsApp Business: before 2.21.3 (fixed in 2.21.3); before 2.21.32 (fixed in 2.21.32)

Published 2021-04-06. Last modified 2026-06-17.