What’s Vulnerable › Vulnerabilities

CVE-2019-8746

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.0% 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-125

Description

An out-of-bounds read was addressed with improved input validation. This issue is fixed in macOS Catalina 10.15, iOS 13, iCloud for Windows 7.14, iCloud for Windows 10.7, tvOS 13, macOS Catalina 10.15.1, Security Update 2019-001, and Security Update 2019-006, watchOS 6, iTunes 12.10.1 for Windows. A remote attacker may be able to cause unexpected application termination or arbitrary code execution.

Affected products

• Apple iCloud for Windows: before 7.14; from 10.0 before 10.7 — fixed in 10.7, 7.14
• Apple Iphone Os: before 13.1 — fixed in 13.1
• Apple iTunes for Windows: before 12.10.1 — fixed in 12.10.1
• macOS: before 10.15 — fixed in 10.15
• Apple tvOS: before 13 — fixed in 13
• Apple watchOS: before 6.0 — fixed in 6.0

How to fix

Upgrade to a fixed version: Apple iCloud for Windows 10.7, 7.14; Apple Iphone Os 13.1; Apple iTunes for Windows 12.10.1; macOS 10.15; Apple tvOS 13; Apple watchOS 6.0. Check the vendor advisory for mitigations.

References

• https://support.apple.com/en-us/HT210604
• https://support.apple.com/en-us/HT210606
• https://support.apple.com/en-us/HT210607
• https://support.apple.com/en-us/HT210634
• https://support.apple.com/en-us/HT210635
• https://support.apple.com/en-us/HT210636
• https://support.apple.com/en-us/HT210637
• https://support.apple.com/en-us/HT210722
• https://support.apple.com/en-us/HT210604
• https://support.apple.com/en-us/HT210606
• https://support.apple.com/en-us/HT210607
• https://support.apple.com/en-us/HT210634

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