The ability to create a Report based on Software Signature Scan Data is not available by default.
The workaround is to run the following SQL Query against the MDB database:
select distinct dhw.label, DATEADD(s, smod.stdate, '1/1/1970'), mod.moname, smod.sttext,
smod.status, smod.stcount, mod.moname from ca_discovered_hardware as dhw
join statmod as smod on dhw.dis_hw_uuid = smod.object_uuid
join ncmodcfg as mod on smod.moid = mod.moid and smod.mdomid = mod.domainid
where mod.moname = 'Software Inventory Configuration'