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

Source: https://junglewise.ai/threats/cve-2019-3568-whatsapp-voip-stack-buffer-overflow-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2022-04-19. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2019-3568 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2022-04-19

A buffer overflow vulnerability in the WhatsApp VOIP stack allows remote code execution via a specially crafted series of RTCP packets. An attacker can trigger the flaw by sending these packets to a target phone number without requiring user interaction.

Technologies: [Meta Platforms WhatsApp](https://junglewise.ai/threats/technologies/whatsapp). Vendors: [Meta Platforms](https://junglewise.ai/threats/vendors/meta-platforms).

## Quick answers

**Is CVE-2019-3568 exploited in the wild?** Yes. CVE-2019-3568 is known to be exploited in the wild, first recorded on 19 April 2022. Treat it as urgent.

**How severe is CVE-2019-3568?** Critical severity, with a CVSS score of 9.8, published 19 April 2022.

**Which products and versions are affected?** WhatsApp WhatsApp for Android prior to v2.19.134; WhatsApp WhatsApp Business for Android prior to v2.19.44; WhatsApp WhatsApp for iOS prior to v2.19.51; WhatsApp WhatsApp Business for iOS prior to v2.19.51; and 2 more.

**Is there a fix for CVE-2019-3568?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2019-3568 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2019-3568?** Check whether you run Meta Platforms WhatsApp. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- WhatsApp WhatsApp for Android prior to v2.19.134
- WhatsApp WhatsApp Business for Android prior to v2.19.44
- WhatsApp WhatsApp for iOS prior to v2.19.51
- WhatsApp WhatsApp Business for iOS prior to v2.19.51
- WhatsApp WhatsApp for Windows Phone prior to v2.18.348
- WhatsApp WhatsApp for Tizen prior to v2.18.15

## Timeline

- 2019-05-14: disclosed: NVD Published Date
- 2022-04-19: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
- 2022-04-19: exploited: Reported as exploited in the wild

## Related threats

- [Meta WhatsApp incorrect authorization in linked device synchronization](https://junglewise.ai/threats/cve-2025-55177-meta-whatsapp-incorrect-authorization-in-linked-device)
- [WhatsApp Cross-Site Scripting Vulnerability](https://junglewise.ai/threats/cve-2019-18426-whatsapp-cross-site-scripting-vulnerability)