About the security content of watchOS 6.3

This document describes the security content of watchOS 6.3.

About Apple security updates

For our customers' protection, Apple doesn't disclose, discuss, or confirm security issues until an investigation has occurred and patches or releases are available. Recent releases are listed on the Apple security updates page.

Apple security documents reference vulnerabilities by CVE-ID when possible.

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watchOS 6.3

Security

Available for: Apple Watch Series 1 and Apple Watch Series 2

Impact: Unauthorized code execution may lead to an authentication policy violation

Description: This issue was addressed with improved checks.

CVE-2020-27951: Apple