CVE-2019-14899: Apple iPadOS

High severity, CVSS 7.4. EPSS: 0.8% chance of exploitation in the next 30 days.

A vulnerability was discovered in Linux, FreeBSD, OpenBSD, MacOS, iOS, and Android that allows a malicious access point, or an adjacent user, to determine if a connected user is using a VPN, make positive inferences about the websites they are visiting, and determine the correct sequence and acknowledgement numbers in use, allowing the bad actor to inject data into the TCP stream. This provides everything that is needed for an attacker to hijack active connections inside the VPN tunnel.

Affected products

• Apple iPadOS: before 13.6 (fixed in 13.6)
• Apple iPhone OS: before 13.6 (fixed in 13.6)
• Apple Mac OS X: before 10.15.6 (fixed in 10.15.6)
• Apple macOS: version 11.0 only
• Apple tvOS: before 13.4.8 (fixed in 13.4.8)
• Freebsd Freebsd: affected versions not specified
• Linux Linux Kernel: affected versions not specified
• OpenBSD OpenBSD: affected versions not specified

Published 2019-12-11. Last modified 2026-06-17.