On November 20, 2014, WordPress 4.0.1 was released to the public and WordPress 3.9.3 was released as an automatic security update for WordPress 3.9.2.
To download WordPress 3.9.3, update automatically from the Dashboard > Updates menu in your site's admin area or visit https://wordpress.org/download/release-archive/.
For step-by-step instructions on installing and updating WordPress:
If you are new to WordPress, we recommend that you begin with the following:
From the announcement post:
readme.html wp-admin/about.php wp-admin/includes/image.php wp-admin/press-this.php wp-includes/class-phpass.php wp-includes/formatting.php wp-includes/http.php wp-includes/js/tinymce/plugins/wpeditimage/plugin.js wp-includes/js/tinymce/plugins/wpeditimage/plugin.min.js wp-includes/js/tinymce/wp-tinymce.js.gz wp-includes/kses.php wp-includes/media.php wp-includes/pluggable.php wp-includes/user.php wp-includes/version.php wp-login.php