CVE-2026-64766

Analyzed Analyzed - Analysis Complete

Integer Overflow in Apple iOS and macOS

Publication date: 2026-07-27

Last updated on: 2026-07-29

Assigner: Apple Inc.

Description

An integer overflow was addressed with improved input validation. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6, watchOS 26.6. Processing a maliciously crafted file may lead to unexpected app termination or arbitrary code execution.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-07-27

Last Modified

2026-07-29

Generated

2026-08-17

AI Q&A

2026-07-28

EPSS Evaluated

2026-08-15

NVD

CVE-2026-64766

EUVD

EUVD-2026-49563

Affected Vendors & Products

Vendor	Product	Version / Range
apple	macos	From 14.0 (inc) to 14.8.8 (exc)
apple	macos	From 15.0 (inc) to 15.7.8 (exc)
apple	macos	From 26.0 (inc) to 26.6 (exc)
apple	ipados	to 26.6 (exc)
apple	iphone_os	to 26.6 (exc)
apple	tvos	to 26.6 (exc)
apple	visionos	to 26.6 (exc)
apple	watchos	to 26.6 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-190	The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

Attack-Flow Graph

Executive Summary

This vulnerability is an integer overflow caused by insufficient input validation. It affects multiple Apple operating systems including iOS, iPadOS, macOS, tvOS, visionOS, and watchOS. Processing a specially crafted file could lead to app crashes or arbitrary code execution.

Detection Guidance

This vulnerability is related to integer overflow in Apple operating systems. Detection primarily involves checking installed software versions against the patched releases (iOS 26.6, iPadOS 26.6, macOS Sequoia 15.7.8, etc.). No specific network detection commands are provided in the available context.

Impact Analysis

The vulnerability could allow attackers to crash apps or execute malicious code on your device by tricking you into opening a maliciously crafted file. This could compromise your data or device control if exploited.

Compliance Impact

The provided CVE data does not specify direct impacts on compliance with GDPR, HIPAA, or other standards. The vulnerability involves an integer overflow leading to app termination or arbitrary code execution, which could potentially compromise data integrity or confidentiality if exploited.

Mitigation Strategies

Update affected Apple devices to the latest versions: iOS 26.6, iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6, or watchOS 26.6. Avoid processing untrusted files until updates are applied.

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