BlockSec: suspected exploit drains ~$395K from Arbitrum's Futureswap

On January 10, 2026, BlockSec's Phalcon flagged suspicious transactions against Arbitrum's Futureswap and estimated losses of around $395,000 after a suspected exploit that drained USDC via repeated changePosition calls. BlockSec said it tried to contact the team without success and noted the closed-source contract leaves the root cause under investigation.