  A sample of 7253 $K^\pm\to\pi^\pm e^+e^-$ decay candidates with 1.0%
background contamination has been collected by the NA48/2 experiment at the
CERN SPS, which allowed a precise measurement of the form factor, the branching
ratio, and the CP violating asymmetry of $K^+$ and $K^-$ decay widths was
investigated. The results of the $K^\pm\to\pi^\pm e^+e^-$ analysis, as well as
the status of the $K^\pm\to\pi^\pm\mu^+\mu^-$ analysis based in the same data
set, are reported.
