CVE-2019-8637

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% 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-20

Description

An input validation issue was addressed with improved input validation. This issue is fixed in iOS 12.3, tvOS 12.3, watchOS 5.2.1. A malicious application may be able to gain root privileges.

Affected products

Apple Iphone Os: before 12.3 — fixed in 12.3
Apple tvOS: before 12.3 — fixed in 12.3
Apple watchOS: before 5.2.1 — fixed in 5.2.1

How to fix

Upgrade to a fixed version: Apple Iphone Os 12.3; Apple tvOS 12.3; Apple watchOS 5.2.1. Check the vendor advisory for mitigations.

References

https://support.apple.com/HT210118
https://support.apple.com/HT210120
https://support.apple.com/HT210122
https://support.apple.com/HT210118
https://support.apple.com/HT210120
https://support.apple.com/HT210122

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