# ACryptoS Halts Operations After Exploit Hits 77 Vaults Across Five Chains

By Simon Yoon

Canonical URL: https://www.tokenpost.com/news/technology/52565
Published: 2026-11-09T21:24:36.000Z
Updated: 2026-11-09T21:24:36.000Z
Section: Technology

> The protocol estimates losses at about $665,000. Deposits are disabled, withdrawals remain open, and ACryptoS has urged users to withdraw.

ACryptoS said an exploit affected 77 vaults across five blockchain networks, causing about $665,000 in losses and prompting the decentralized finance protocol to halt operations.

On Nov. 9, the project said it had disabled deposits but left withdrawals available. It urged users to remove their assets because it could no longer sustain the maintenance needed to keep the project running.

The vulnerability stemmed from missing input validation, allowing an attacker to deposit a very small amount of tokens and receive most of a vault's shares.

The exploit caused about $665,000 in losses across 77 vaults on five networks. It said funds taken in the exploit had moved through several cross-chain protocols and offered the attacker a 10% bounty for returning the funds.

ACryptoS is a decentralized finance yield aggregator whose affected products were vaults. Withdrawals remain open while the project winds down.