Apple has released quite substantial updates to its iWork suite overnight. Detailed release notes covering new and improved features are available for Pages 5.6, Keynote 6.6, and Numbers 3.6. Among many others, I note that each app now opens documents from older versions more reliably; this issue has been the cause of several problems documented in Q&A here.

Not detailed on those pages are the security fixes, which include:

• multiple input validation issues which could lead to compromise of user information,
• maliciously crafted documents could lead to app termination or arbitrary code execution, particularly in Pages.

Updates are available through the App Stores for OS X 10.10.4, OS X 10.11, and iOS 8.4 and later.