Cryptocurrency exchange Bitget said the attacker who stole about 388 million dollars gained access through a vulnerability in a third-party security product the exchange used. The attacker exploited the flaw to obtain high-level internal credentials, then on September 24 used them to reach an internal management system and insert fraudulent withdrawal commands into wallet backend services, where they were treated as legitimate. The stolen funds came from Bitget's hot and warm wallets, while its offline cold wallets were unaffected. CEO Gracy Chen described the incident publicly, confirming the earlier statement that a critical wallet backend system had been compromised and used to spoof transaction data and trigger approvals.