CVE-2019-8660

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 13.8% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2019-12-18 · updated 2026-06-17
Weakness: CWE-787

Description

A memory corruption issue was addressed with improved input validation. This issue is fixed in iOS 12.4, macOS Mojave 10.14.6, tvOS 12.4, watchOS 5.3. A remote attacker may be able to cause unexpected application termination or arbitrary code execution.

Affected products

Apple Iphone Os: before 12.4 — fixed in 12.4
macOS: before 10.14.6 — fixed in 10.14.6
Apple tvOS: before 12.4 — fixed in 12.4
Apple watchOS: before 5.3 — fixed in 5.3

How to fix

Upgrade to a fixed version: Apple Iphone Os 12.4; macOS 10.14.6; Apple tvOS 12.4; Apple watchOS 5.3. Check the vendor advisory for mitigations.

References

https://support.apple.com/HT210346
https://support.apple.com/HT210348
https://support.apple.com/HT210351
https://support.apple.com/HT210353
https://support.apple.com/HT210346
https://support.apple.com/HT210348
https://support.apple.com/HT210351
https://support.apple.com/HT210353

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