What’s Vulnerable › Vulnerabilities

CVE-2020-36521

• Severity: high (CVSS 7.1 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: 2022-09-23 · updated 2026-06-17
• Weakness: CWE-125

Description

An out-of-bounds read was addressed with improved input validation. This issue is fixed in iCloud for Windows 11.4, iOS 14.0 and iPadOS 14.0, watchOS 7.0, tvOS 14.0, iCloud for Windows 7.21, iTunes for Windows 12.10.9. Processing a maliciously crafted tiff file may lead to a denial-of-service or potentially disclose memory contents.

Affected products

• Apple iCloud for Windows: before 7.21; from 11.0 before 11.4 — fixed in 11.4, 7.21
• Apple iPadOS: before 14.0 — fixed in 14.0
• Apple Iphone Os: before 14.0 — fixed in 14.0
• Apple iTunes for Windows: before 12.10.9 — fixed in 12.10.9
• Apple macOS: before 10.15.7 — fixed in 10.15.7
• Apple tvOS: before 14.0 — fixed in 14.0
• Apple watchOS: before 7.0 — fixed in 7.0

How to fix

Upgrade to a fixed version: Apple iCloud for Windows 11.4, 7.21; Apple iPadOS 14.0; Apple Iphone Os 14.0; Apple iTunes for Windows 12.10.9; Apple macOS 10.15.7; Apple tvOS 14.0; Apple watchOS 7.0. Check the vendor advisory for mitigations.

References

• https://support.apple.com/en-us/HT211843
• https://support.apple.com/en-us/HT211844
• https://support.apple.com/en-us/HT211846
• https://support.apple.com/en-us/HT211847
• https://support.apple.com/en-us/HT211850
• https://support.apple.com/en-us/HT211952
• https://support.apple.com/en-us/HT211843
• https://support.apple.com/en-us/HT211844
• https://support.apple.com/en-us/HT211846
• https://support.apple.com/en-us/HT211847
• https://support.apple.com/en-us/HT211850
• https://support.apple.com/en-us/HT211952

Get alerted when CVE-2020-36521 or the next vulnerability affects your stack