An overview of the results on the charged Higgs boson searches by the CMS Collaboration is presented. As different models with extended Higgs sectors predict different production and decay modes for these particles, the CMS search program for charged Higgs bosons covers a variety of final states targeting different models. The results of searches for charged Higgs bosons decaying into $\mathrm{c}\overline{\mathrm{s}}$, $\mathrm{c}\overline{\mathrm{b}}$, $\mathrm{t}\overline{\mathrm{b}}$, $\tau^{+}\nu_\tau$, $\mathrm{W}^{+}\mathrm{Z}$ (or charge-conjugate final states) and for doubly-charged Higgs bosons decaying into $\mathrm{W}^{\pm}\mathrm{W}^{\pm}$ are summarized. The observed limits agree with the standard model predictions.