Massive China Data Leak: Hackers Access 10 Petabytes of Weapons Testing Data

Reports have emerged online of a major data breach at China’s National Supercomputing Center in Tianjin.

Hackers claim they stole about 10 petabytes of internal data, much of it classified, according to NetAskari on Substack.

The first mentions of the database being put up for sale appeared on a dark web forum by a user known as ‘airborneshark1.’

The attackers are demanding substantial sums for full access to the dataset, offering a preview of the stolen files for $3,000.

Responsibility for the cyberattack has been claimed by a group called Flaming China, whose Telegram channel has been active since early February 2026.

The National Supercomputing Center in Tianjin is a state-run facility of strategic importance. It provides resources for complex digital simulations, from weather modeling to weapons physics, widely used by China’s military contractors.

Analysis of the leaked data samples suggests they are authentic. Publicly released materials include images of internal directories, user credentials, technical manuals in PDF format, and results of radar system tests.

Among the stolen materials are documents marked ‘classified for 10 years.’ One report from 2025 contains results of tests on bunker-busting munitions and physical models simulating strikes on HIMARS rocket systems.

A separate portion of the data is dedicated to virtual simulations of attacks on aircraft carriers and fortified bunker structures. The hackers also released video materials showing animated processes of missile warhead testing.

Part of the leak includes complex tables and binary files related to a project called Stealth. The documents mention U.S. X-47B drones and SurroOpt systems.

Анімація знищення бункера китайським боєприпасом.

Джерело: FlamingChina pic.twitter.com/XNCCXMAPpl

— Владислав (@Vladislav110528) March 19, 2026

Shortly after the first reports of the breach, the Chinese Academy of Sciences dismissed several senior officials involved in military development, including Yang Wei, the chief designer of the J-20 fighter jet.

If the reported scale of the leak – 10 petabytes (10,240 terabytes) – is confirmed, it could become the most significant blow to China’s defense industry in decades.