On 8 November 2026 ACryptoS published a post-mortem of its own. Between 02:02 and 16:22 UTC that day, about $665,429 left concentrated-liquidity vaults on Arbitrum, BNB Smart Chain, Polygon, Base, and Optimism. The project counts 77 of 126 vaults hit, and 135 addresses. Every affected vault has rejected deposits since 16:40 UTC. Withdrawals stayed open. ACryptoS says the vaults are being retired, that no fix and no reopening of deposits is planned, and that people who deposited should withdraw. The loss sits with those depositors. The post-mortem does not promise to make them whole. This page will not name the call, and it will not walk through an example.
A vault here is a pool that holds a trading position for the people who deposited into it. A share of the vault is a share of what the vault holds. What is DeFi?. When new shares are minted for too little, the old shares are a claim on a smaller pile. That is the product failure. It is not a chain halt, and it is not an exchange till.
What happened
The project’s own dollar split, using prices from about 17:00 UTC that day, is Arbitrum about $230,213, BNB Smart Chain about $190,845, Polygon about $134,686, Base about $69,813, and Optimism about $39,871. Linea was not hit. About 19,400 of the project’s own ACS token, taken from one BNB Smart Chain vault, is left out of the dollar total because the post-mortem did not price it. The project’s account of the cause, at the level of the outcome, is that a deposit was accepted with a shorter list of amounts than the vault’s tokens, and the vault was then priced as if it held only one of them. A small deposit could take most of the shares. A withdrawal paid both tokens. This page will not go further than that sentence.
On 9 November the project added a note about one Base vault. An address that still held almost all of the shares had started to drain it. ACryptoS says it upgraded that vault and burned those shares, and the extra fee shares minted after the incident. About 1,800 USDbC was already gone. The remaining about 6,187 USDbC is withdrawable, in proportion, by the people who had deposited before. A burn of shares is not a repayment of the $665,429, and it is one vault.
Why it matters
If you deposited into one of these vaults, the share you still hold is a share of what is left, and the project is telling you the deposit door will not reopen. A withdrawal that is open is the way out of the remainder. It is not the coins that already left. If you never deposited, this page did not spend a wallet you hold. See How crypto wallets actually work. A message that offers to “restore” a vault, and asks for a recovery phrase, is not the post-mortem. See How do you keep crypto safe?.
The same week’s larger tills are a different shape. Binance puts the hot-wallet loss near $6.3 billion is a company promising to cover a customer ledger. ACryptoS’s post-mortem does not make that promise. The people who deposited are the ones short.
What happens next
Whether depositors withdraw what remains, which is the action the project asked for. No repayment programme is in the post-mortem. Watch the project’s own documentation. We will not treat “withdrawals remain open” as the $665,429 coming back, and we will not treat a retired vault as a place to deposit.
Not a recommendation to deposit, withdraw, buy, or sell. Not a finding that every concentrated-liquidity vault was hit. Not a description of the deposit. The post-mortem’s own account is a dollar figure, a closed deposit door, an open withdrawal, and no promise to repay.
