Is CVE-2021-24043 actively exploited?

No active exploitation of CVE-2021-24043 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-24043 be exploited remotely?

Yes. CVE-2021-24043 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-24043?

CVE-2021-24043 has a CVSS score of 9.1 (CRITICAL).

HOME VULNERABILITIESCVE-2021-24043

CRITICAL

CVE-2021-24043

CWE-125Published: February 2, 2022· Updated: Jun 17, 2026

9.1

CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2021-24043 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), availability disruption (denial of service), with a CVSS base score of 9.1.