This particular vulnerability affects a publicly traded ERC20 token listed in a top exchange. According to PeckShield this vulnerability has been already exploited in the wild since 2017/12/23 in multiple transactions.
Vulnerable component: Useless Ethereum Token
CVSSv3 score: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L/E:H/RL:U/RC:C
CWE-ID: CWE-190 - Integer Overflow or Wraparound
The vulnerability allows a remote attacker to steal digital assets.
The vulnerability exists due to integer overflow within the transferFrom() function of a smart contract implementation for Useless Ethereum Token (UET). A remote attacker can steal assets (e.g., transfer all victims' balances into their account) because certain computations involving _value are incorrect.
The vulnerability was dubbed "transferFlaw" and has been exploited in the wild in December 2017.