---
id: CVE-2026-84510
title: A heap buffer overflow was addressed with improved bounds checking
summary: >-
  A heap buffer overflow was addressed with improved bounds checking. This issue
  is fixed in iOS 26.7 and iPadOS 26.7, iOS 27 and iPadOS 27, macOS Golden Gate
  27, macOS Sequoia 15.8, macOS Tahoe 26.7. Mounting a maliciously crafted
  volume …
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'
cwe:
  - CWE-122
vendor: apple
product: ipados
affected:
  - ipados < 26.7
  - iphone_os < 26.7
  - 'macos >= 15.0, < 15.8'
  - 'macos >= 26.0, < 26.7'
patched:
  - ipados 26.7
  - iphone_os 26.7
  - macos 26.7
published: '2026-09-14'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T16:36:46.707'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-84510'
references:
  - url: 'https://support.apple.com/en-us/149034'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/149035'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/149041'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/149042'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/149043'
    label: product-security@apple.com
tags:
  - nvd
  - cve.org
epss: 0.00451
epssPercentile: 0.36495
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-17T14:47:38.596884Z'
ingestedAt: '2026-09-14T21:15:17.517Z'
---

## Overview

A heap buffer overflow was addressed with improved bounds checking. This issue is fixed in iOS 26.7 and iPadOS 26.7, iOS 27 and iPadOS 27, macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. Mounting a maliciously crafted volume may lead to unexpected system termination.

## Affected

- `ipados < 26.7`
- `iphone_os < 26.7`
- `macos >= 15.0, < 15.8`
- `macos >= 26.0, < 26.7`

## Remediation

Upgrade past the affected range:

- `ipados 26.7`
- `iphone_os 26.7`
- `macos 26.7`