Apple released updates for its core products that includes iCloud, Safari, MacOS Mojave, High Sierra, & Sierra, tvOS 12.1.2, and of course iOS 12.3.3. These security updates are fixes for code execution, privilege escalations, and information disclosure vulnerabilities. If you are a user of any of the above products, you should update them as soon as possible. Even though iOS and MacOS are the most popular of today’s updates, we also had updates for tvOS, watchOS, Safari and iCloud.
Source: https://www.bleepingcomputer.com/news/security/apple-fixes-numerous-security-vulnerabilities-in-ios-macos-and-more/