What’s Vulnerable › Vulnerabilities

CVE-2020-3864

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-10-27 · updated 2026-06-17
• Weakness: CWE-346

Description

A logic issue was addressed with improved validation. This issue is fixed in iCloud for Windows 7.17, iTunes 12.10.4 for Windows, iCloud for Windows 10.9.2, tvOS 13.3.1, Safari 13.0.5, iOS 13.3.1 and iPadOS 13.3.1. A DOM object context may not have had a unique security origin.

Affected products

• Apple iCloud for Windows: before 7.17; from 10.0 before 10.9.2 — fixed in 10.9.2, 7.17
• Apple iPadOS: before 13.3.1 — fixed in 13.3.1
• Apple Iphone Os: before 13.3.1 — fixed in 13.3.1
• Apple iTunes for Windows: before 12.10.4 — fixed in 12.10.4
• Apple Safari: before 13.0.5 — fixed in 13.0.5
• Apple tvOS: before 13.3.1 — fixed in 13.3.1
• RedHat Enterprise Linux Desktop: 7.0
• RedHat Enterprise Linux Server: 7.0
• RedHat Enterprise Linux Workstation: 7.0

How to fix

Upgrade to a fixed version: Apple iCloud for Windows 10.9.2, 7.17; Apple iPadOS 13.3.1; Apple Iphone Os 13.3.1; Apple iTunes for Windows 12.10.4; Apple Safari 13.0.5; Apple tvOS 13.3.1. Check the vendor advisory for mitigations.

References

• https://support.apple.com/en-us/HT210918
• https://support.apple.com/en-us/HT210920
• https://support.apple.com/en-us/HT210922
• https://support.apple.com/en-us/HT210923
• https://support.apple.com/en-us/HT210947
• https://support.apple.com/en-us/HT210948
• https://support.apple.com/en-us/HT210918
• https://support.apple.com/en-us/HT210920
• https://support.apple.com/en-us/HT210922
• https://support.apple.com/en-us/HT210923
• https://support.apple.com/en-us/HT210947
• https://support.apple.com/en-us/HT210948

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