CVE-2021-30807 Apple Multiple Products Memory Corruption
Attackers can execute arbitrary code with kernel privileges via memory corruption, requiring immediate patching of Apple operating systems.
- Exploited in the wild
- Since 3 Nov 2021
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-30807?
CVE-2021-30807 is a high-severity memory corruption vulnerability in Apple Ipados, published on 19 Oct 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
A memory corruption issue was addressed with improved memory handling. This issue is fixed in macOS Big Sur 11.5.1, iOS 14.7.1 and iPadOS 14.7.1, watchOS 7.6.1. An application may be able to execute arbitrary code with kernel privileges. Apple is aware of a report that this issue may have been actively exploited.
Weakness: CWE-787
Which versions are affected by CVE-2021-30807?
It affects 4 products.
Products include Apple Ipados, Apple Iphone Os, Apple Macos, Apple Watchos.
How do I fix CVE-2021-30807?
No fix has been published for CVE-2021-30807 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 17 Nov 2021.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2021-30807 being exploited?
Yes. Attackers have exploited CVE-2021-30807 in the wild since at least 3 Nov 2021.
Public exploit code: 2 proofs of concept on GitHub.
Other vulnerabilities in Apple Ipados
- CVE-2025-43300 Apple iOS, iPadOS, and macOS Out-of-Bounds Write
- CVE-2025-24201 Apple Multiple Products WebKit Out-of-Bounds Write
- CVE-2025-24085 Apple Multiple Products Use-After-Free
- CVE-2025-31200 Apple Multiple Products Memory Corruption
- CVE-2025-31201 Apple Multiple Products Arbitrary Read and Write
Sources
Also known as GHSA-676h-wcx2-4w5q.