Qubic Halts Network After 1,404 Wallets Are Drained

Qubic said an attacker drained 1,404 wallets holding approximately 2.94 trillion QU between October 17 and 18, prompting the project to halt its network. The incident was attributed to weakly generated wallet seeds, and Qubic said the network remained paused in updates published October 19. Qubic said the stolen tokens were worth about $1.3 million to $1.4 million. The project reported that 87.1% of the funds remained frozen on its network, while 12.9% was sent to cryptocurrency exchange MEXC, which froze the receiving account. These figures and the account of the exploit stem from Qubic’s incident reporting. The network stopped at tick 85,371,949, according to Qubic. The project said the seed-generation weakness affected seeds created using browsers on iPhones or iPads, Safari on a Mac until October 18, 2026, and the Qubic iOS app before July 2025. It did not say that all wallets were affected. Qubic said it corrected the flaw in version 4.26.4 of its web wallet. A code update replaced JavaScript’s Math.random function with crypto.getRandomValues when generating seeds. The project attributed the theft to vulnerable seed generation rather than a defect in the blockchain...