In recent news, talk about Russia possibly opening military bases in cuba was shot down by a top Russian diplomat on the 26th.
During an interview the diplomat stated “We have no plans to open a military base on Cuba. This has not even been discussed, ever. We are developing our relations with Cuba on a completely different plane. The issues of combat readiness of the Cuban military forces are a completely different aspect and there is absolutely no grounds to suggest that we are planning to set up anything there,” the head of the Russian Foreign Ministry’s Department for Latin America, Aleksandr Schetinin, said in an interview with RIA Novosti.
Apparently during the Soviet Union era, Russia had a huge military intelligence base in cuba with over 3000 people working abroad there. It was closed in 2001 due to it costing too much money to maintain it. It's now used as a university in cuba.