CVE-2021-30733 Information disclosure in iOS and iPadOS
Attackers can disclose process memory by tricking users into processing a maliciously crafted font 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-2021-30733?
CVE-2021-30733 is a medium-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 out-of-bounds read was addressed with improved input validation. This issue is fixed in tvOS 14.6, iOS 14.6 and iPadOS 14.6, Security Update 2021-004 Catalina, Security Update 2021-005 Mojave, macOS Big Sur 11.4, watchOS 7.5. Processing a maliciously crafted font may result in the disclosure of process memory.
Weakness: CWE-125
Which versions are affected by CVE-2021-30733?
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-2021-30733?
No fix has been published for CVE-2021-30733 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-30733 being exploited?
There is no known exploitation of CVE-2021-30733 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-jf77-8jp8-mmmm.