About the security content of iOS 11.2.1 - Apple Support

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. For more information about security, se...

Apple Releases Security Updates

Apple has released security updates to address vulnerabilities in multiple products. A remote attacker could exploit one of these vulnerabilities to take control of an affected system. US-CERT encourages users and administrators to review Apple security pages for the following products and apply...