A search for excited leptons, carried out with the CMS detector in pp collision at the LHC with TeV, is presented. The search has been performed for an associated production of a lepton and an oppositely charged excited lepton pp →ll *, followed by the decay l *→lγ, resulting in llγ final state, where l = e,μ. No excess above the Standard Model expectation is observed in the data. Interpreting the findings in the context of l * production through four-fermion contact interactions and l * decay via electroweak processes, upper limits are reported for l * production at this collision energy and the exclusion region in the Λ − M(l *) parameter space is extended beyond the previously established limits.