The idea of putting a Klub series missile inside a shipping container is an interesting concept but, since the Russians will sell anything short of nuclear weapons and delivery systems to anyone with enough money it poses hazards to every country in the world. For instance, say Osama Bin Laden decides to use some of his vast fortune to say, buy 10 Club K units, ships them to Mexico, bribes the Mexican customs into letting him through and, then runs them into the U.S.. From there you have a multitude of problems since thousands upon thousands of shipping containers move through the U.S. daily and, the ones you are looking for look exactly the same as the ones carrying merchandise to the grocery store. Then you have 40 cruise missiles aimed at targets throughout the U.S. then they let fly and, wham! At least 20 high value targets like the White House, the Golden Gate Bridge or the Empire State Building, gone or severely damaged in an instant.
What makes this situation worse is that this could happen to any country in the world, all you need are some muslim extremists or disgruntled citizens, a few million dollars, which is turned into a few Club K units and wham!