CVE-2021-24042

CRITICAL
Published Jan 4, 20224y ago · Modified Jun 17, 20262w ago
9.8 CVSS 3.1
Critical
Find Similar
Published Jan 4, 2022 4y ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
9.8
Exploitability
3.9
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 2

CWE-122
CWE-787 Out-of-bounds Write Memory Safety

Affected Products 6

VendorProductVersionRange
whatsappwhatsapp* <2.21.23
whatsappwhatsapp* <2.21.23
whatsappwhatsapp* <2.21.230
whatsappwhatsapp* <2.21.230
whatsappwhatsapp* <2.2143
whatsappwhatsapp* <2.2146

References 1

  • whatsapp.com https://www.whatsapp.com/security/advisories/2021/
    Not ApplicableVendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.