A studies related to the future Vertex Detector (VD) for the D_{0} meson (open charm) measurements in the NA61/SHINE experiment at the CERN SPS are presented. The VD will allow for precise track reconstruction at the target proximity. The measurement of D_{0} mesons provide a unique opportunity to test the validity of perturbative QCD-based and statistical models of nucleus–nucleus collisions at SPS energies. Moreover, the production and propagation of charm in heavy-ion collisions is sensitive to the high-density effects and phase transitions. These measurements will be a challenging adventure due to the low multiplicity and short life time of D_{0} mesons. This study also addresses the issue of VD optimization and the emphasis is put on the prospect of the development of a VD based on CMOS technology.