Is CVE-2021-24026 actively exploited?

No active exploitation of CVE-2021-24026 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-24026 be exploited remotely?

Yes. CVE-2021-24026 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-24026?

CVE-2021-24026 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2021-24026

CRITICAL

CVE-2021-24026

CWE-787Published: April 6, 2021· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2021-24026 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), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

From a weakness classification perspective (CWE-787): Out-of-bounds write vulnerabilities can lead to data corruption, crashes, or arbitrary code execution.