South Korean blockchain technology company Ozys' cross-chain protocol Orbit Bridge suffered a hacker attack worth $81.5 million. The company stated in a blog post on Thursday that its former chief information security officer had arbitrarily weakened the company's firewall before the security vulnerability occurred. The company has filed a lawsuit for damages against its former chief information security officer and submitted a petition requesting that local police investigate the former employee's possible connection to the hacker attack. Ozys claimed that the former security chief made several modifications to the internal firewall on November 22nd, and two days ago, the employee requested to resign voluntarily. It is reported that he left the company on December 6th without informing the company of the changes made to the security settings, and Ozys discovered these changes on January 10th. On January 1st, an "unknown access" of Orbit Bridge sent 50 million US dollars of stablecoins (30 million USDT, 10 million DAI, and 10 million USDC), 231 wBTC (about 10 million US dollars), and 9,500 Ethereum (about 21.5 million US dollars) to eight new wallets through six transactions.