It's a little different in different parts of the region.
The Islamic State, Daesh, is in Russia. There was a local group, the Caucasus Emirate, that was very active for a number of years. They fell apart recently, in part due to Russian government pressure, in part due to internal pressure. Daesh has pretty much picked up their goal, and they are definitely the violent radical Islamist game in town in Russia, although other groups also come and go.
In central Asia, the affiliations aren't as clear. I think what's interesting about central Asia is that a decent number of the folks who end up radicalized and potentially going to Syria do it by first migrating as labour migrants to Russia and then becoming radicalized in Russia.
I think all of these countries play up the threat and indeed perceive the threat as greater than it actually is. If you dig into it, we're talking about really small numbers of people. They do carry out the occasional attack. You can also get, particularly in Russia—the case that I know best—situations where things are termed radical Islamist violent attacks when in fact they might be something else, because it's an easy way to make sure you get rid of these folks.
The problem is there. The problem is probably smaller than it appears to officials, and it's smaller than it's built up to be. I think in some ways that actually helps it to grow, because when you crack down on every observant Muslim, you might then force more people into more radical and potentially more violent tendencies than they might have had if they were allowed to worship peacefully.