  The CDF collaboration has recently reported an updated result on the
$W$-boson mass measurement, showing a $7\sigma$ deviation from the standard
model prediction. The discrepancy may indicate new contributions to the Fermi
coupling constant. We study simple extensions of the standard model by
introducing an extra scalar, fermion or vector field. It is found that the
tension implies the new physics existing in multi-TeV scales if the new
coupling to the electron and/or muon is of order unity.
