CVE-2026-20657: Apple iPadOS

Medium severity, CVSS 6.5. EPSS: 0.5% chance of exploitation in the next 30 days.

A buffer overflow issue was addressed with improved memory handling. This issue is fixed in iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.4, visionOS 26.4. Parsing a maliciously crafted file may lead to an unexpected app termination.

Affected products

• Apple iPadOS: before 18.7.7 (fixed in 18.7.7)
• Apple iPhone OS: before 18.7.7 (fixed in 18.7.7)
• Apple macOS: from 14.0, before 14.8.5 (fixed in 14.8.5); from 15.0, before 15.7.5 (fixed in 15.7.5)

Published 2026-03-25. Last modified 2026-06-17.