Hexens Discloses Aptos Has Fixed a Critical Vulnerability, With a Theoretical Maximum Exposure of Up to $70 Billion.
2 hours ago
Blockchain security firm Hexens has disclosed a critical vulnerability in Aptos’ Move virtual machine, detected in February this year, that theoretically could put roughly $70 billion in crypto assets at risk. However, the Aptos team patched the mainnet within hours of the vulnerability being disclosed, with no user funds lost. Hexens said the flaw stems from a "stale-cache" issue in the Move VM, which can cause type confusion, letting attackers seize critical permissions including stablecoin minting, cross-chain bridges, and DeFi protocols. In simulation tests, the research team used only a ~$3,000 server to set up the environment, hitting a ~90% attack success rate without requiring validator node permissions or internal access. Aptos responded that it fixed the issue rapidly after receiving the report through its bug bounty program, adding that the vulnerability has very low exploitability in real-world networks and poses no actual harm to users or funds. Hexens warned that malicious exploitation could extend risks beyond the Aptos ecosystem to infrastructure like cross-chain bridges, stablecoins, and centralized exchanges. Independent security firm Grego AI estimates that roughly $250 million in total value locked (TVL) on the Aptos chain was directly affected, with the overall theoretical risk exposure peaking at around $70 billion.
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