Searches for BSM Higgs bosons in the $VV, Vh$ and $hh$ decays in CMS

We present recent searches for high-mass scalarbosons ($H$) 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 exclusionsin specific theory frameworks beyond the Standard Model, such as 2-Higgs-Doublet Models, are presented.