CVE-2025-43300 Apple iOS, iPadOS, and macOS Out-of-Bounds Write

Exploited in the wild Critical 10.0 Published 21 Aug 2025 Updated 2 Apr 2026

Processing a malicious image file can cause memory corruption, potentially allowing code execution in Apple operating systems.

Exploited in the wild: Since 21 Aug 2025
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2025-43300?

CVE-2025-43300 is a critical memory corruption vulnerability in Apple Ipados, published on 21 Aug 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 15.8.5 and iPadOS 15.8.5, iOS 16.7.12 and iPadOS 16.7.12, iOS 18.6.2 and iPadOS 18.6.2, iPadOS 17.7.10, macOS Sequoia 15.6.1, macOS Sonoma 14.7.8, macOS Ventura 13.7.8. Processing a malicious image file may result in memory corruption. Apple is aware of a report that this issue may have been exploited in an extremely sophisticated attack against specific targeted individuals.

Weakness: CWE-787

Which versions are affected by CVE-2025-43300?

It affects 3 products.

Products include Apple Ipados, Apple Iphone Os, Apple Macos.

How do I fix CVE-2025-43300?

No fix has been published for CVE-2025-43300 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 11 Sep 2025.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2025-43300 being exploited?

Yes. Attackers have exploited CVE-2025-43300 in the wild since at least 21 Aug 2025.

Public exploit code: 5 proofs of concept on GitHub.

All Apple Ipados vulnerabilities

Sources

Also known as GHSA-cpwx-wfp4-x368.