CVE-2021-24042 | BDVDB-2026-167113 Detail

FacebookWhatsApp Desktop

Description#

The calling logic for WhatsApp for Android prior to v2.21.23, WhatsApp Business for Android prior to v2.21.23, WhatsApp for iOS prior to v2.21.230, WhatsApp Business for iOS prior to v2.21.230, WhatsApp for KaiOS prior to v2.2143, WhatsApp Desktop prior to v2.2146 could have allowed an out-of-bounds write if a user makes a 1:1 call to a malicious actor.

Impact#

Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact high. Attack vector: network.

Weaknesses#

CWE-122 Heap-based Buffer Overflow
CWE-787 Out-of-bounds Write

References#

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

Exploit#

No public exploit known

History#

Version 12022-01-04Record published in the CVE List.
Version 22025-05-22Most recent update recorded in the CVE List.

Published

Published: 2022-01-04
Last modified: 2025-05-22

Vendor information

Vendor: Facebook
Product: WhatsApp Desktop

All Facebook vulnerabilities

Score

9.8 Critical

EPSS

1.2%, Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 70.3.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Memory Corruption

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
< v2.2146
Fixed
v2.2146
Vulnerable
Not stated
Fixed
v2.2146

Scoring System

CVSS v4.0

Not available

CVSS v3.1

9.8 Critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	None
User Interaction	None
Scope	Unchanged
Confidentiality	High
Integrity	High
Availability	High

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).