CVE-2018-6350: WhatsApp

Critical severity, CVSS 9.8. EPSS: 1.7% chance of exploitation in the next 30 days.

An out-of-bounds read was possible in WhatsApp due to incorrect parsing of RTP extension headers. This issue affects WhatsApp for Android prior to 2.18.276, WhatsApp Business for Android prior to 2.18.99, WhatsApp for iOS prior to 2.18.100.6, WhatsApp Business for iOS prior to 2.18.100.2, and WhatsApp for Windows Phone prior to 2.18.224.

Affected products

• WhatsApp WhatsApp: before 2.18.99 (fixed in 2.18.99); before 2.18.100.6 (fixed in 2.18.100.6); before 2.18.224 (fixed in 2.18.224)
• WhatsApp WhatsApp Business: before 2.18.100.2 (fixed in 2.18.100.2); before 2.18.276 (fixed in 2.18.276)

Published 2019-06-14. Last modified 2026-06-17.