Yes, as that source makes clear, the Cavaliers have traded all their second round picks out to 2019*.
As for the ones they've "acquired" from other teams. See all those "protected top 55" clauses? That means the Cavs aren't getting 'em except potentially the Clippers pick in 2016.
EDIT: *To make it clearer, 2015 to Jazz, 2016 to Celtics, 2017 to Celtics, 2018 to Sixers, 2019 to Knicks.