On the main PHP.net site, they've posted announcements about the release of minor versions of PHP 7.1.x and 5.6.x: 7.1.16 and 5.6.35.

The PHP development team announces the immediate availability of PHP 5.6.35 [and PHP 7.1.16]. This is a security release. One security bug was fixed in this release. All PHP 5.6 [and 7.1] users are encouraged to upgrade to this version.

The bugfixes included in these releases deal with changes in the FPM handling, ODBC functionality, and Phar building. You can download this latest release from the main downloads page (source) or from the windows.php.net site for the Windows binaries.