CVE-2021-30760 Integer overflow in Security Update - Catalina
An integer overflow in font processing allows arbitrary code execution via a maliciously crafted font file on Apple operating systems.
- Exploited in the wild
- Not known
- 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-2021-30760?
CVE-2021-30760 is a high-severity vulnerability in Apple Ipados, published on 8 Sep 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
An integer overflow was addressed through improved input validation. This issue is fixed in iOS 14.7, macOS Big Sur 11.5, watchOS 7.6, tvOS 14.7, Security Update 2021-005 Mojave, Security Update 2021-004 Catalina. Processing a maliciously crafted font file may lead to arbitrary code execution.
Weakness: CWE-190
Which versions are affected by CVE-2021-30760?
It affects 6 products.
Products include Apple Ipados, Apple Iphone Os, Apple Mac Os X, Apple Macos, Apple Tvos, Apple Watchos.
How do I fix CVE-2021-30760?
No fix has been published for CVE-2021-30760 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-30760 being exploited?
There is no known exploitation of CVE-2021-30760 in the wild and no public exploit code.
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-4ccr-c6hg-r7x3.