We present recent searches for high-mass scalar
bosons ($H$) decaying to light-Higgs ($h$) or gauge ($V$) bosons in the CMS experiment,
using 13 TeV proton-proton collision data from the RunII of the LHC machine.
Namely, searches for $H \rightarrow hh$, $A \rightarrow Zh$, and
$H \rightarrow ZZ$ are reported.
Model-independent constraints on cross-sections or parameter exclusions
in specific theory frameworks beyond the Standard Model, such as
2-Higgs-Doublet Models, are presented.