Joomla! 3.6.4 has been released this morning and we are actively updating all Bear Web Design Client websites with this upgrade. This is a security release for the 3.x series of Joomla! which addresses two critical security vulnerabilities and a bug fix for two-factor authentication.
This release only contains the security fixes and bug fix; no other changes have been made compared to the Joomla! 3.6.3 release.