cPanel Inc. announced that cPanel 11.40 will reach End of Life at the end of October 2014.
In accordance with their EOL policy [http://go.cpanel.net/longtermsupport], 11.40 will continue functioning on servers after reaching EOL. However, no further updates, such as security fixes and installations, will be provided for 11.40 once it reaches its EOL date.
It is recommend that all customers migrate any existing installations of cPanel & WHM 11.40 to a newer version (either 11.42 or 11.44).
If your server setup complicates the process of migrating to a newer version of cPanel & WHM (an upgrade blocker list is available at http://go.cpanel.net/blockers), then cPanel is here to help. Simply open a support ticket at https://tickets.cpanel.net/submit so that they can provide recommendations, migration assistance, and more.