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CVE-2019-3568: WhatsApp VOIP Stack Buffer Overflow Vulnerability

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2022-04-19
• EPSS: 30.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-05-14 · updated 2026-06-17
• Weakness: CWE-122

Description

A buffer overflow vulnerability in WhatsApp VOIP stack allowed remote code execution via specially crafted series of RTCP packets sent to a target phone number. The issue affects WhatsApp for Android prior to v2.19.134, WhatsApp Business for Android prior to v2.19.44, WhatsApp for iOS prior to v2.19.51, WhatsApp Business for iOS prior to v2.19.51, WhatsApp for Windows Phone prior to v2.18.348, and WhatsApp for Tizen prior to v2.18.15.

Affected products

• Facebook WhatsApp for Android: before 2.18.15; before 2.18.348; before 2.19.51; before 2.19.134 — fixed in 2.18.15, 2.18.348, 2.19.134, 2.19.51
• Whatsapp Business: before 2.19.44; before 2.19.51 — fixed in 2.19.44, 2.19.51

How to fix

Upgrade to a fixed version: Facebook WhatsApp for Android 2.18.15, 2.18.348, 2.19.134, 2.19.51; Whatsapp Business 2.19.44, 2.19.51. Check the vendor advisory for mitigations.

References

• http://www.securityfocus.com/bid/108329
• https://www.facebook.com/security/advisories/cve-2019-3568
• http://www.securityfocus.com/bid/108329
• https://www.facebook.com/security/advisories/cve-2019-3568
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-3568

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