  Searches for lepton flavor violation (LFV) stand at the forefront of
experimental particle physics research, offering a sensitive probe to many
scenarios of physics beyond the Standard Model. The high proton-proton
collision energy and luminosity provided by the CERN Large Hadron Collider
(LHC) and the excellent CMS detector performance allow for an extensive program
of LFV searches. This article reviews a broad range of LFV searches conducted
at the CMS experiment using data collected in LHC Run 2, including
$\tau\to3\mu$ decays, Higgs boson decays, and top quark production and decays.
In each analysis, the online and offline event selections, signal modeling,
background suppression and estimation, and statistical interpretation are
elucidated. These searches involve various final state particles in a large
transverse momentum range, showcasing the capability of the CMS experiment in
exploring fundamental questions in particle physics.
