CVE-2021-24043

Severity: critical (CVSS 9.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-02-02 · updated 2026-06-17
Weakness: CWE-125

Description

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

Facebook WhatsApp for Android: 2.21.23.2, 2.21.230.6, 2.2145.0
Whatsapp Business: 2.21.23.2, 2.21.230.7

References

https://www.whatsapp.com/security/advisories/2021/
https://www.whatsapp.com/security/advisories/2022/
https://www.whatsapp.com/security/advisories/2021/

Get alerted when CVE-2021-24043 or the next vulnerability affects your stack