---
id: CVE-2026-86950
title: An out-of-bounds write issue was addressed with improved bounds checking
summary: >-
  An out-of-bounds write issue was addressed with improved bounds checking. This
  issue is fixed in iOS 26.7.1 and iPadOS 26.7.1, macOS Sequoia 15.8.1, macOS
  Tahoe 26.7.1. Processing a maliciously crafted file may lead to arbitrary code
  exe…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-787
vendor: Apple
product: iOS and iPadOS
affected:
  - ios_and_ipados < 26.7.1
  - macOS < 15.8.1
  - macOS < 26.7.1
published: '2026-09-28'
updated: '2026-09-28'
sourceUpdated: '2026-09-28T21:10:50.050'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-86950'
references:
  - url: 'https://support.apple.com/en-us/149226'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/149228'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/149229'
    label: product-security@apple.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-28T19:42:49.828459Z'
ingestedAt: '2026-09-28T20:20:05.661Z'
---

## Overview

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 26.7.1 and iPadOS 26.7.1, macOS Sequoia 15.8.1, macOS Tahoe 26.7.1. Processing a maliciously crafted file may lead to arbitrary code execution. Apple is aware of a report that this issue may have been exploited in an extremely sophisticated attack against specific targeted individuals on versions of iOS before iOS 27.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.