What is CVE-2019-3568?
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.
The record classifies CVE-2019-3568 under weakness class CWE-122. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 6 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 2729 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 9.8 — CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS (FIRST)
- 39.1% probability of exploitation in the next 30 days, higher than 98.4% of all scored CVEs
- CISA KEV
- Listed since 2022-04-19, federal remediation deadline 2022-05-10
- Threadlinqs priority
- 9/10 — CISA KEV-listed, which Threadlinqs floors at 9
- Published
- 2019-05-14, last modified 2025-10-21
Is CVE-2019-3568 being exploited?
CISA added CVE-2019-3568 to the Known Exploited Vulnerabilities catalog on 2022-04-19, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2022-05-10 under BOD 22-01. Weaponised exploit code for CVE-2019-3568 is publicly available. 1 public proof-of-concept repository is tracked for this identifier. It currently carries a trending score of 43 in the Threadlinqs vulnerability feed.
- trickest/cve (trickest)
Affected products and versions
- Facebook: WhatsApp for Android, WhatsApp Business for Android, WhatsApp for iOS, WhatsApp Business for iOS, WhatsApp for Windows Phone, WhatsApp for Tizen
How to fix CVE-2019-3568
Because CVE-2019-3568 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2022-05-10. No vendor patch reference has been recorded for CVE-2019-3568 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.
Threat activity tracking CVE-2019-3568
1 tracked threat in the Threadlinqs corpus references CVE-2019-3568, either in the campaign’s CVE list or as an indicator on the campaign record.
Sources
Enriched from CVE.org, NVD, FIRST EPSS, CISA KEV, GitHub Security Advisories, public proof-of-concept repositories. Last verified by Threadlinqs on . This product uses the NVD API but is not endorsed or certified by the NVD.