---
id: CVE-2025-43539
title: The issue was addressed with improved bounds checks
summary: >-
  The issue was addressed with improved bounds checks. This issue is fixed in
  iOS 18.7.3 and iPadOS 18.7.3, iOS 26.2 and iPadOS 26.2, macOS Sequoia 15.7.3,
  macOS Sonoma 14.8.3, macOS Tahoe 26.2, tvOS 26.2, visionOS 26.2, watchOS 26.2.
  Proc…
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
  - CWE-119
vendor: apple
product: macos
affected:
  - macos < 14.8.3
  - 'macos >= 15.0, < 15.7.3'
patched:
  - macos 15.7.3
published: '2025-12-12'
updated: '2026-09-30'
sourceUpdated: '2026-09-30T20:10:00.247'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-43539'
references:
  - url: 'https://support.apple.com/en-us/125884'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/125885'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/125886'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/125887'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/125888'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/125889'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/125890'
    label: product-security@apple.com
  - url: 'https://support.apple.com/en-us/125891'
    label: product-security@apple.com
tags:
  - nvd
epss: 0.06155
epssPercentile: 0.9325
ingestedAt: '2026-09-30T20:23:19.452Z'
---

## Overview

The issue was addressed with improved bounds checks. This issue is fixed in iOS 18.7.3 and iPadOS 18.7.3, iOS 26.2 and iPadOS 26.2, macOS Sequoia 15.7.3, macOS Sonoma 14.8.3, macOS Tahoe 26.2, tvOS 26.2, visionOS 26.2, watchOS 26.2. Processing a file may lead to memory corruption.

## Affected

- `macos < 14.8.3`
- `macos >= 15.0, < 15.7.3`

## Remediation

Upgrade past the affected range:

- `macos 15.7.3`