A Joomla! 3.6.4 release containing a security fix will be published on Tuesday 25th October at approximately 14:00 UTC. The Joomla! Security Strike Team (JSST) has been informed of a critical security issue in the Joomla! core. Since this is a very important security fix, please be prepared to update your Joomla! installations next Tuesday. Until the release is out, please understand that we cannot provide any further information.
All current Templates are working with J 3.6.4, therefore please update your Joomla as soon as possible