On August 22 an attacker exploited a vulnerability in the Cosmos EVM precompile layer and drained a single account on TAC. We halted the chain at block 24,671,475 to stop it. The defect is not in TAC-specific code. It sits in the shared Cosmos EVM module, and several other chains running that module were hit by the same class of attack within a day.

This was a drain, not a mint. No tokens were created and total supply is unchanged: 2,985,651,403 TAC was moved from one account to another. Only $TAC was affected, and all other assets on TAC are intact.

We are finalising the technical post-mortem and the relaunch plan, and expect to publish both tomorrow. The plan is built to normalize $TAC balances and include all the necessary Cosmos fixes to safely restore the network.

We are working with SEAL 911 and with exchanges on the funds that moved.

https://x.com/TacBuild/status/2091873937655574938