Earlier last week Apple released security updates for the following products:
Apple Keynote (updated to version 6.6 to resolve 3 CVEs (defined))
Apple Pages (updated to version 5.6 to resolve 4 CVEs)
Apple Numbers (updated to version 3.6 to resolve 3 CVEs)
iWork for iOS (updated to version 2.6)
Full details on all updates are available on Apple’s Security Updates page. I would suggest prioritizing the installation of the updates for Keynote, Pages, and Numbers since they address critical security issues.
If you use any of the above software, please install the appropriate updates as soon as possible. They are available as separate downloads from Apple’s App Store.