Just released this morning - also includes a security issue so they're advising people update as soon as possible!
http://docs.solusvm.com/release_versions_stable#section11600
http://docs.solusvm.com/release_versions_stable#section11600
Security
This release contains security updates as instructed in an external audit conducted by Rack911.
It is advised that you update to v1.16.00 as soon as possible to take advantage of the security changes made within the system. We will release further information about any issues found in due course.
If your version of SolusVM still displays v1.15.04 as the newest update you can initiate a manual update within your master from SSH with the following command: sh /scripts/upcp as the version numbers may be cached for a short while.