---
id: CVE-2026-20690
title: An out-of-bounds access issue was addressed with improved bounds checking
summary: >-
  An out-of-bounds access issue was addressed with improved bounds checking.
  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, tvOS 26.4,
  visionOS 26…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'
cvssSource: adp
vendor: Apple
product: iOS and iPadOS
affected:
  - ios_and_ipados < 18.7.7
  - ios_and_ipados < 26.4
  - macOS < 14.8.5
  - macOS < 15.7.5
  - macOS < 26.4
  - tvOS < 26.4
  - visionOS < 26.4
  - watchOS < 26.4
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-03-25T16:16:28.897241Z'
published: '2026-03-25'
updated: '2026-10-26'
sourceUpdated: '2026-10-26T20:41:40.439Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-20690'
references:
  - url: 'https://support.apple.com/en-us/126792'
  - url: 'https://support.apple.com/en-us/126793'
  - url: 'https://support.apple.com/en-us/126794'
  - url: 'https://support.apple.com/en-us/126795'
  - url: 'https://support.apple.com/en-us/126796'
  - url: 'https://support.apple.com/en-us/126797'
  - url: 'https://support.apple.com/en-us/126798'
  - url: 'https://support.apple.com/en-us/126799'
tags:
  - cve.org
epss: 0.00752
epssPercentile: 0.54814
ingestedAt: '2026-10-27T16:11:59.020Z'
---

## Overview

An out-of-bounds access issue was addressed with improved bounds checking. 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, tvOS 26.4, visionOS 26.4, watchOS 26.4. Processing an audio stream in a maliciously crafted media file may terminate the process.

## Affected

- `ios_and_ipados < 18.7.7`
- `ios_and_ipados < 26.4`
- `macOS < 14.8.5`
- `macOS < 15.7.5`
- `macOS < 26.4`
- `tvOS < 26.4`
- `visionOS < 26.4`
- `watchOS < 26.4`

## Remediation

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