What’s Vulnerable › Vulnerabilities

CVE-2020-3872

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-02-27 · updated 2026-06-17
• Weakness: CWE-665

Description

A memory initialization issue was addressed with improved memory handling. This issue is fixed in iOS 13.3.1 and iPadOS 13.3.1, macOS Catalina 10.15.3, tvOS 13.3.1, watchOS 6.1.2. An application may be able to read restricted memory.

Affected products

• Apple iPadOS: before 13.3.1 — fixed in 13.3.1
• Apple Iphone Os: before 13.3.1 — fixed in 13.3.1
• macOS: before 10.15.3 — fixed in 10.15.3
• Apple tvOS: before 13.3.1 — fixed in 13.3.1
• Apple watchOS: before 6.1.2 — fixed in 6.1.2

How to fix

Upgrade to a fixed version: Apple iPadOS 13.3.1; Apple Iphone Os 13.3.1; macOS 10.15.3; Apple tvOS 13.3.1; Apple watchOS 6.1.2. Check the vendor advisory for mitigations.

References

• https://support.apple.com/HT210918
• https://support.apple.com/HT210919
• https://support.apple.com/HT210920
• https://support.apple.com/HT210921
• https://support.apple.com/HT210918
• https://support.apple.com/HT210919
• https://support.apple.com/HT210920
• https://support.apple.com/HT210921

Get alerted when CVE-2020-3872 or the next vulnerability affects your stack