CVE-2020-27930 Apple Multiple Products Memory Corruption

Exploited in the wild High 7.8 Published 8 Dec 2020 Updated 21 Oct 2025

Attackers can execute arbitrary code by tricking users into processing a maliciously crafted font on 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-2020-27930?

CVE-2020-27930 is a high-severity memory corruption vulnerability in Apple Ipados, published on 8 Dec 2020. 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 input validation. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.1, iOS 12.4.9, watchOS 6.2.9, Security Update 2020-006 High Sierra, Security Update 2020-006 Mojave, iOS 14.2 and iPadOS 14.2, watchOS 5.3.9, macOS Catalina 10.15.7 Supplemental Update, macOS Catalina 10.15.7 Update. Processing a maliciously crafted font may lead to arbitrary code execution.

Weakness: CWE-787

Which versions are affected by CVE-2020-27930?

It affects 5 products.

Products include Apple Ipados, Apple Iphone Os, Apple Mac Os X, Apple Macos, Apple Watchos.

How do I fix CVE-2020-27930?

No fix has been published for CVE-2020-27930 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 3 May 2022.

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

Is CVE-2020-27930 being exploited?

Yes. Attackers have exploited CVE-2020-27930 in the wild since at least 3 Nov 2021.

Public exploit code: 1 proofs of concept on GitHub.

All Apple Ipados vulnerabilities

Sources

Also known as GHSA-pcwp-p8jm-7xc7.