Root-cause analysis not yet published. The incident description below contains all currently available signal — review the attack transaction directly for definitive forensics.
Following a security incident, TAC identified an exploit on the TON side of its cross-chain layer carried out by an external attacker. The incident resulted in a loss of approximately $2.8M across USDT, BLUM, and tsTON. The TAC token, TON, and all ERC-20 tokens bridged from Ethereum are NOT affected. The bridge remains paused while forensic analysis and remediation are ongoing. A post-mortem will be published soon. The team is working with law enforcement and security partners to trace funds and plans to make users whole via a structured sale of Foundation TAC token reserves. Attack method (per SlowMist): Contract Vulnerability. Reported loss: $ 2,800,000.
- chain
- ethereum
- protocol
- TAC Cross-Chain Layer (TON Side)
- bug_class
- logic
- date_occurred
- 2026-05-13
- loss_usd
- $2,800,000
- source_id
- sm:tac-cross-chain-layer-ton-side-::2026-05-13