An insider with access to a disclosed timelock vulnerability exploited it to bypass vesting contract protections and withdraw 500K SGT governance tokens. The vulnerability had been identified on April 26 and shared with the team, but the insider used this knowledge to drain locked tokens four times on June 19-23.

The Ethereum 2.0 staking solution SharedStake released an attacked report, stating that the reason the SharedStake token was minted before the official launch was due to the use of vulnerabilities in time-locked contracts (that is, smart contracts that perform certain operations at a fixed time) by internal personnel. The vulnerability was submitted to the team by the white hat Lucash-dev on April 26. Because a team member had permission to view the vulnerability, he used the vulnerability to cast a value of about 50 on the main network four times on June 19 and 23. Ten thousand USD tokens were sold and mortgaged after the official launch. Although there is not enough evidence, the core members of SharedStake suspect that it was the work of a new team member.