What’s Vulnerable › Vulnerabilities

CVE-2019-8542

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-12-18 · updated 2026-06-17
• Weakness: CWE-120

Description

A buffer overflow was addressed with improved bounds checking. This issue is fixed in iOS 12.2, macOS Mojave 10.14.4, tvOS 12.2, watchOS 5.2, iTunes 12.9.4 for Windows, iCloud for Windows 7.11. A malicious application may be able to elevate privileges.

Affected products

• Apple iCloud for Windows: before 7.11 — fixed in 7.11
• Apple Iphone Os: before 12.2 — fixed in 12.2
• Apple iTunes for Windows: before 12.9.4 — fixed in 12.9.4
• macOS: before 10.14.4 — fixed in 10.14.4
• Apple tvOS: before 12.2 — fixed in 12.2
• Apple watchOS: before 5.2 — fixed in 5.2

How to fix

Upgrade to a fixed version: Apple iCloud for Windows 7.11; Apple Iphone Os 12.2; Apple iTunes for Windows 12.9.4; macOS 10.14.4; Apple tvOS 12.2; Apple watchOS 5.2. Check the vendor advisory for mitigations.

References

• https://support.apple.com/HT209599
• https://support.apple.com/HT209600
• https://support.apple.com/HT209601
• https://support.apple.com/HT209602
• https://support.apple.com/HT209604
• https://support.apple.com/HT209605
• https://support.apple.com/HT209599
• https://support.apple.com/HT209600
• https://support.apple.com/HT209601
• https://support.apple.com/HT209602
• https://support.apple.com/HT209604
• https://support.apple.com/HT209605

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