Last week, I downloaded the Cumulative Fix Pack 15 for 6.2 SP1 from Package Share. Today it is no longer in the list if I search for "6.2-SP1-CFP15". If I search for just "CFP15", I get various packages for AEM-FORMS and an older CFP for 6.1 SP2 (AEM-6.1-SP2-CFP15).
The downloaded file was named "AEM-6.2-AP1-CFP15-15.0.zip". The release date shown in Package Share was 6 June 2018.
According to the Release Notes for 6.2 Cumulative Fix Packs, CFP14 is one of the latest "previous CFP", implying that there must be a CFP15.