CVE-2019-3568

WhatsApp VOIP Stack Buffer Overflow Vulnerability

Exploited in attacks Critical 9.8 Attack chance: 30%

What it is

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.

CISA: 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.

What to do

Apply updates per vendor instructions.

Deadline for US federal agencies: May 10, 2022

Added to the CISA list: April 19, 2022
Published: May 14, 2019
Severity: Critical 9.8 CVSS 3.1
Chance of attacks in the next 30 days (EPSS): 30% in the top 1.8% of all known vulnerabilities
Weakness: CWE-122
More details: NVD · CVE.org · CISA

All references (2)

More exploited flaws from Meta Platforms

Added	Vulnerability	Product	Severity	Attack chance
Sep 2, 2025	Incorrect AuthorizationCVE-2025-55177	WhatsApp	Medium 5.4	13%
May 23, 2022	Cross-Site ScriptingCVE-2019-18426	WhatsApp	High 8.2	68%

All of them →

Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.