Searches for flavor changing neutral currents in top production and decay using data collected by
the Compact Muon Solenoid (CMS) experiment at $\sqrt{s}$ = 7 and \mbox{8 TeV} are presented,
corresponding to an integrated luminosity of around 5 fb$^{-1}$ and 20 fb$^{-1}$.
FCNC searches are conducted to probe $tqZ$, $tq\gamma$, $tqH$, and $tgq$ interactions in various channels.
By the time of the 38$^{th}$ ICHEP conference in 2016,
the upper limits on \mbox{$\mathcal{B}(t \to u\gamma)$ $<$ 0.013\% }, \mbox{$\mathcal{B}(t \to ug)$ $<$ 0.036\%}, \mbox{$\mathcal{B}(t \to uZ)$ $<$ 0.05\%} and
\mbox{$\mathcal{B}(t \to uH)$ $<$ 0.42\%} at the 95\% confidence level had been obtained by the CMS collaboration.