CVE-2021-24043: WhatsApp

Critical severity, CVSS 9.1. EPSS: 1.1% chance of exploitation in the next 30 days.

A missing bound check in RTCP flag parsing code prior to WhatsApp for Android v2.21.23.2, WhatsApp Business for Android v2.21.23.2, WhatsApp for iOS v2.21.230.6, WhatsApp Business for iOS 2.21.230.7, and WhatsApp Desktop v2.2145.0 could have allowed an out-of-bounds heap read if a user sent a malformed RTCP packet during an established call.

Affected products

• WhatsApp WhatsApp: version 2.21.23.2 only; version 2.21.230.6 only; version 2.2145.0 only
• WhatsApp WhatsApp Business: version 2.21.23.2 only; version 2.21.230.7 only

Published 2022-02-02. Last modified 2026-06-17.