  The most recent CMS results from a search for supersymmetry (SUSY) with a
compressed mass spectrum in leptonic final states will be presented. The search
is targeting signatures with missing transverse momentum and two or three
low-momentum (soft) leptons. The dataset used is collected by the CMS
experiment during the Run-2 p-p collisions at $\sqrt{s} = {}$13 TeV at the LHC,
and corresponds to an integrated luminosity of up to 137 fb$^{-1}$. The
observed data are found to be in agreement with the standard model (SM)
prediction and exclusion upper limits are set on the SUSY particles production
cross section. The results are interpreted in terms of electroweakino and top
squark pair production. In both cases, a small mass difference between the
produced SUSY particles and the lightest neutralino is considered. A wino-bino
and a higgsino simplified models are used for the electroweakino
interpretation. Exclusion limits at 95% confidence level are set on
$\tilde{\chi}_{2}^{0}$/$\tilde{\chi}_{1}^{\pm}$ masses up to 280 GeV for a mass
difference between the $\tilde{\chi}_{2}^{0}$/$\tilde{\chi}_{1}^{\pm}$ and the
lightest neutralino of 10 GeV for the wino-bino production. In the higgsino
interpretation $\tilde{\chi}_{2}^{0}$/$\tilde{\chi}_{1}^{\pm}$ masses are
excluded up to 210(150) GeV for a mass difference of 7.5(3) GeV. The results
for the higgsino production are additionally interpreted in terms of a
phenomenological minimal SUSY extension of the SM, excluding the higgsino mass
parameter $\mu$ up to 180 GeV for bino mass parameter $M_1 = {}$800 GeV. Upper
limits at 95% confidence level are set on the top squark pair production
interpretation, excluding top squark masses up to 530 GeV in the four-body top
squark decay model and up to 475 GeV in the chargino-mediated decay model for a
mass difference between the top squark and the lightest neutralino of 30 GeV.
