The drone, expected to have a maximum range of 10,000 kilometers (over 6200 miles) will be able to bypass NATO's missile defense system.
A presentation slide with information on the Status-6 project was accidentally broadcast on Russian TV as part of a story covering Vladimir Putin's meeting with defense officials in Sochi, the Kremlin confirmed.
"It is true that some classified information was captured on camera and subsequently deleted. We hope that this won't happen again," Kremlin spokesman Dmitry Peskov said on Wednesday.
The document says that the drone will be developed by the Rubin design bureau. Two nuclear-powered "Project 09852" and "Project 09851" submarines that Rubin is currently working on will be tasked with launching the drone.
The Saint-Petersburg-based Rubin design bureau is responsible for developing the majority of nuclear subs in service with the Russian Navy, including the ultra-modern Borei class warmachines. The Project 955 submersibles are intended to serve as the backbone of Russia's maritime nuclear deterrence.