CVE-2026-64771CWE-119

CVE-2026-64771

Critical · published July 28, 2026

CVSS v3.1

9.8

EPSS

Percentile

57.6

In the wild

Unconfirmed

What it is

A buffer overflow was addressed with improved bounds checking. This issue is fixed in iOS 18.7.10 and iPadOS 18.7.10, iOS 26.6 and iPadOS 26.6, macOS Sequoia 15.7.8, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6. A remote attacker may be able to cause unexpected application termination or heap corruption.

The record

Technical detail

CVSS v3.1: 9.8 · CRITICAL
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0: Not supplied
EPSS: 0.00847 · 57.6th percentile
Weakness: CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer
Published: 2026-07-28T01:17Z

Affected products (6)

Product	Versions	Fixed in
apple/ipados	< 26.6	26.6
apple/iphone_os	< 26.6	26.6
apple/macos	≥ 15.0, < 15.7.8	15.7.8
apple/macos	≥ 26.0, < 26.6	26.6
apple/tvos	< 26.6	26.6
apple/visionos	< 26.6	26.6

References (6)

https://support.apple.com/en-us/128066 · [email protected]https://support.apple.com/en-us/128067 · [email protected]https://support.apple.com/en-us/128069 · [email protected]https://support.apple.com/en-us/128070 · [email protected]https://support.apple.com/en-us/128071 · [email protected]https://support.apple.com/en-us/148287 · [email protected]

EPSS history

Timeline

27 JUL 20:13Z
A buffer overflow was addressed with improved bounds checking
cvelistv5