  Exploring MSSM parameter space after the discovery of Higgs Boson with mass
125 GeV naturally demands large top-squark mixing or large trilinear coupling
parameter $A_t$ in particular, so as to avoid excessively heavy squark,
specially for the universal models like CMSSM. We study stability of
electroweak symmetry breaking vacua in possible presence of deeper charge-color
symmetry breaking minima within MSSM. Besides stable vacua, we consider
scenarios characterized by the presence of global CCB minima, with SM like
charge and color conserving vacuum, having stability over cosmologically large
lifetime {(\it long-lived states)}. We allow vacuum expectation values for both
stop as well as sbottom fields, since these belong to the third generation of
sfermions with larger Yukawa couplings that have immediate effect on the
tunneling time. Moreover, for large $\mu$ regions, radiative corrections to
Higgs boson mass from bottom-squark loop is quite significant. Regions of MSSM
parameters space become viable for large $A_t$ and large $\mu$ zones which are
generically excluded via the traditional analytical CCB constraints. For a
large value of $\tan\beta$, safe vacua associated with large values of $|\mu|$
and $|A_t|$ are predominantly long-lived and may be associated with relatively
light stop masses. We also identify low $\mu$ regions associated with
long-lived states. Both the above zones can be friendly to muon $g-2$
constraint. We also impose constraints from ${\rm Br}(B \rightarrow X_s
\gamma)$ and ${\rm Br}(B_s \rightarrow \mu^+ \mu^-)$. We do the analysis for a
moderate and a large $\tan\beta$. Results are compatible with dark matter
related constraints, as expected.
