The measurement of ${\rm BR}(K^+\to\pi^+\nu\bar{\nu})$ constitutes a precision test of the Standard Model,
given the extremely theoretically clean environment.
The NA62 Experiment at CERN SPS has been designed to this purpose.
Its commissioning phase is complete and the experiment is taking good quality data.
A preliminary exploratory analysis, aimed to assess the detector performance and the sensitivity,
has been performed using a small fraction of the 2016 data taking.