French defense contractor Naval Group is investigating a cyberattack after hackers leaked approximately 13 gigabytes of internal data on July 23, 2025. The leaked information reportedly includes source code for combat systems, including those used in nuclear submarines. The full cache of stolen data is said to exceed 1 terabyte. The breach follows a recent commitment by French President Emmanuel Macron, though the exact timing is considered notable. Despite media reports confirming the hack, Naval Group has denied the claims, describing the incident as a "reputational attack." Separately, a U.S. spy satellite agency also experienced a breach but stated that no classified information was compromised.
Naval Group Denies Hack Claims, Alleges "Reputational Attack" https://t.co/1wm87BeZjy
This seems true, French media confirm that Naval Group was hacked and that "a first batch of data of about 13 GB was published on July 23, 2025 as proof" (https://t.co/P1rGg7CwR5 ) Obviously speculation but the timing is interesting, just a couple of days after Macron committed https://t.co/w3Cqon41VQ
Naval Group victime d'un incident d'origine cyber. J'ai lu beaucoup de commentaires et c'est effarant : je ne savais pas qu'il y avait autant de spécialistes en cybersécurité sur ce réseau. On me dit dans l'oreillette que ce sont les spécialistes covid qui se sont reconvertis. https://t.co/q3IrLPDgsC