Hacker steals and leaks source code for French combat systems, including those for nuclear submarines. A hacker using the alias "Neferpitou" has leaked 13GB of internal Naval Group data, with a full cache reportedly exceeding 1TB. The breach also affects systems linked to Thales, Dassault, and Safran. The leaked files include the complete source code for combat systems used on French frigates and nuclear submarines, weapon system software, simulation environments, network designs, user manuals, and internal communications. No ransom was requested; the hacker demanded a response within 72 hours and then published the data for free. Naval Group confirmed it is investigating. Analysts believe the breach is authentic, marking what could be the largest defense data leak in French history. If it’s in a database, it can be hacked. A lot harder to hack physical documents.