What’s Vulnerable › Vulnerabilities

CVE-2020-27920

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% 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-416

Description

A use after free issue was addressed with improved memory management. This issue is fixed in macOS Big Sur 11.1, Security Update 2020-001 Catalina, Security Update 2020-007 Mojave, macOS Big Sur 11.0.1, iOS 14.2 and iPadOS 14.2, watchOS 7.1, tvOS 14.2. Processing maliciously crafted web content may lead to code execution.

Affected products

• Apple iPadOS: before 14.2 — fixed in 14.2
• Apple Iphone Os: before 14.2 — fixed in 14.2
• macOS: before 11.0.1; before 11.1.0 — fixed in 11.0.1, 11.1.0
• Apple tvOS: before 14.2 — fixed in 14.2
• Apple watchOS: before 7.1 — fixed in 7.1

How to fix

Upgrade to a fixed version: Apple iPadOS 14.2; Apple Iphone Os 14.2; macOS 11.0.1, 11.1.0; Apple tvOS 14.2; Apple watchOS 7.1. Check the vendor advisory for mitigations.

References

• https://support.apple.com/en-us/HT211928
• https://support.apple.com/en-us/HT211929
• https://support.apple.com/en-us/HT211930
• https://support.apple.com/en-us/HT211931
• https://support.apple.com/en-us/HT212011
• https://support.apple.com/en-us/HT211928
• https://support.apple.com/en-us/HT211929
• https://support.apple.com/en-us/HT211930
• https://support.apple.com/en-us/HT211931
• https://support.apple.com/en-us/HT212011

Get alerted when CVE-2020-27920 or the next vulnerability affects your stack