Post-Mortem: The Cosmos EVM Exploit on TAC
Between August 20 and August 25, attackers exploited a vulnerability in the Cosmos EVM module and extracted funds from multiple blockchains. TAC was one of six networks affected.
On August 22 a single transaction moved our entire staking bonded pool, 2,985,651,403.40 TAC, to an attacker-controlled account. Together with TAC validators we halted the network the same evening. This was a drain, not a mint: total supply did not change and only $TAC was affected.
Today we are publishing the official post-mortem, detailing what happened, how it happened, where the funds went, how we are recovering, and what it means for stakers and holders.
The approved recovery plan restores staking balances in full. No action is required from delegators.
If you hold $TAC on BNB Chain, do not trade it. How those holdings are treated in the recovery will be announced separately.
Read the full post-mortem: https://tac.build/blog/tac-mainnet-security-incident
tac.build
Post-Mortem Report: The Cosmos EVM Exploit on TAC
Post-mortem analysis of the Cosmos EVM exploit that affected TAC on August 22: what happened, where the funds went, and how the network is recovering.
8
6
6
5September 2, 2026 635 18
