CVE-2026-86991

Received Received - Intake

Buffer Overflow in iOS and iPadOS

Publication date: 2026-10-26

Last updated on: 2026-10-26

Assigner: Apple Inc.

Description

A buffer overflow was addressed with improved bounds checking. This issue is fixed in iOS 26.7.2 and iPadOS 26.7.2, iOS 27.2 and iPadOS 27.2, macOS Golden Gate 27.2, macOS Sequoia 15.8.2, macOS Tahoe 26.7.2, visionOS 27.2. Processing a maliciously crafted file may lead to unexpected process termination.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-10-26

Last Modified

2026-10-26

Generated

2026-10-27

AI Q&A

2026-10-27

EPSS Evaluated

N/A

NVD

CVE-2026-86991

EUVD

EUVD-2026-110422

Affected Vendors & Products

Vendor	Product	Version / Range
Apple	iOS and iPadOS	0
Apple	iOS and iPadOS	0
Apple	macOS	0
Apple	macOS	0
Apple	macOS	0
Apple	visionOS	0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This is a buffer overflow vulnerability caused by insufficient bounds checking. Processing a specially crafted file could trigger unexpected process termination in affected Apple operating systems.

Impact Analysis

An attacker could exploit this to crash applications or potentially execute arbitrary code on your device by tricking you into opening a malicious file. This may lead to data loss or unauthorized access depending on the affected application.

Mitigation Strategies

Update affected Apple devices to the latest versions: iOS 26.7.2 or later, iPadOS 26.7.2 or later, macOS Golden Gate 27.2 or later, macOS Sequoia 15.8.2 or later, macOS Tahoe 26.7.2 or later, and visionOS 27.2 or later. Avoid processing untrusted files until updates are applied.

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