In article , "Richard D. Saam"
writes:

There are no (within 95% CL)
WIMP annihilation cross sections and decay lifetimes
as measured by FERMI LAT
that could contribute to dark matter.
http://arxiv.org/abs/1305.5597

Note that this says nothing about the viability of WIMPs as dark matter.
It could be that they neither annihilate nor decay.