According to official sources, the DeFi oracle Umbrella Network was stolen over 3 million UMB tokens due to a loophole in the ChainSwap contract of the cross-chain asset bridge. This equates to approximate 110 ETH as noted in terms of the $UMB token buyback scheme initiated to counteract the additional $UMB sold by the hackers. As of 15th of July, Umbrella has already bought back about 90 ETH worth of $UMB, with a remaining 20 ETH still to be spent.
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