What’s Vulnerable › Vulnerabilities

CVE-2020-27943

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-04-02 · updated 2026-06-17
• Weakness: CWE-787

Description

A memory corruption issue existed in the processing of font files. This issue was addressed with improved input validation. This issue is fixed in tvOS 14.3, iOS 14.3 and iPadOS 14.3, macOS Big Sur 11.1, Security Update 2020-001 Catalina, Security Update 2020-007 Mojave, watchOS 7.2. Processing a maliciously crafted font file may lead to arbitrary code execution.

Affected products

• Apple Ipad Os: before 14.3 — fixed in 14.3
• Apple Iphone Os: before 14.3 — fixed in 14.3
• Apple macOS: before 11.1.0 — fixed in 11.1.0
• Apple tvOS: before 14.3 — fixed in 14.3
• Apple watchOS: before 7.2 — fixed in 7.2

How to fix

Upgrade to a fixed version: Apple Ipad Os 14.3; Apple Iphone Os 14.3; Apple macOS 11.1.0; Apple tvOS 14.3; Apple watchOS 7.2. Check the vendor advisory for mitigations.

References

• https://support.apple.com/en-us/HT212003
• https://support.apple.com/en-us/HT212005
• https://support.apple.com/en-us/HT212009
• https://support.apple.com/en-us/HT212011
• https://support.apple.com/en-us/HT212003
• https://support.apple.com/en-us/HT212005
• https://support.apple.com/en-us/HT212009
• https://support.apple.com/en-us/HT212011

Get alerted when CVE-2020-27943 or the next vulnerability affects your stack