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CVE-2019-3568

WhatsApp VOIP Stack Buffer Overflow Vulnerability

  • Critical 9.8
  • Exploited: added to CISA KEV 19 Apr 2022

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.

Key facts

Published
14 May 2019
Last changed
21 Oct 2025
Assigned by
facebook
KEV added
19 Apr 2022
KEV fix due
10 May 2022
EPSS
30.076% likely to be exploited in the next 30 days, higher than 98.24% of CVEs (scores for 15 Nov 2026)
SSVC (CISA)
Exploitation: active; Automatable: yes; Technical impact: total

Severity scores

Each score is shown as its source gave it. They are not averaged or merged.

  • 9.8CVSS 3.1, Criticalfrom CISA (ADP container)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

What to do

  • Apply updates per vendor instructions.CISA KEV required action

Historical context and remediation

This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.

No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.

Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.

Read the original CVE record.

Affected products

VendorProductVersions
FacebookWhatsApp for Android
  • 2.19.134 (affected)
  • unspecified up to but excluding 2.19.134 (affected)
FacebookWhatsApp Business for Android
  • 2.19.44 (affected)
  • unspecified up to but excluding 2.19.134 (affected)
FacebookWhatsApp for iOS
  • 2.19.51 (affected)
  • unspecified up to but excluding 2.19.51 (affected)
FacebookWhatsApp Business for iOS
  • 2.19.51 (affected)
  • unspecified up to but excluding 2.19.51 (affected)
FacebookWhatsApp for Windows Phone
  • 2.18.348 (affected)
  • unspecified up to but excluding 2.18.348 (affected)
FacebookWhatsApp for Tizen
  • 2.18.15 (affected)
  • unspecified up to but excluding 2.18.15 (affected)

Timeline

  1. 14 May 2019 Published
  2. 19 Apr 2022 CVE-2019-3568 added to CISA KEV
  3. 19 Apr 2022 Added to the CISA KEV catalogue

Weakness

References