  We study how the recent ATLAS and CMS Higgs mass bounds affect the
renormalization group running of the physical parameters in universal extra
dimensions. Using the running of the Higgs self-coupling constant, we derive
bounds on the cutoff scale of the extra-dimensional theory itself. We show that
the running of physical parameters, such as the fermion masses and the CKM
mixing matrix, is significantly restricted by these bounds. In particular, we
find that the running of the gauge couplings cannot be sufficient to allow
gauge unification at the cutoff scale.
