The premise is fairly strong, but would need a great script that takes the story into a direction that subverts expectations. I. S. S. Doesn't do this. In fact, it goes the route of turning characters stupid and having situations happen to fit the narrative rather than coming off at all realistic.
Nothing is worse than a movie that has plot holes that glaringly stick out while you're watching it. You foresee where the shaky plot will falter, then the film proceeds to flounder itself into becoming more and more stupid because the original plot points are too weak to be paid off in a smart way. It is written into a corner where there's too many instances of plot convenience, with many going off the deep end of all plausibility. Characters inexplicably become different persons on a flip of a dime. At one point a character "dies" off screen only to come back for no reason. A character does evil things early on only to become a good guy by the end. Another character can't speak Russian well at all only to become fluent later. Someone else chooses to make a distraction in an unbelievably dangerous way. If the conflict is between the U. S. and Russia, why is the Yucatan Peninsula being bombed? These, and many other dumb decisions, lead to an end that is perhaps the dumbest moment of all.
Ultimately, when a writer can't figure out a smart way to resolve a conflict, then you should rethink the conflict. I. S. S. Becomes more stupid as it goes because its conflicts are too weak to begin with and it digs itself into a never-ending hole by the end. There's not much positive to say about this, because any positivity that I had was only in the first 30 minutes of the movie. Do yourself a favor and skip this one.
