What Is EIP-7702? Ethereum's Smart Account Feature Explained, and How to Stay Safe

EIP-7702 is a recent Ethereum upgrade that allows regular Ethereum wallets, known as externally owned accounts (EOA), to run smart contract code. Introduced in May 2025, it enables wallets to behave like smart accounts, and it went live on Ethereum mainnet on May 7, 2025. The upgrade requires each delegation to include the wallet's own signature, making the Binance hack appear like a signing-side failure rather than an Ethereum bug.

EIP-7702 enables three primary uses: batching, sponsorship, and privilege de-escalation. Batching allows several actions, such as approving and swapping, to be executed in a single transaction. Sponsorship enables another account to pay the network fee for a wallet, with the repayment potentially in a different token. Privilege de-escalation involves granting a sub-key narrow permissions, like spending tokens but not ETH.

The difference between an EIP-7702 delegation and a token approval lies in their scope and risk. A token approval allows one app to move a specific token up to a set amount, while an EIP-7702 delegation grants the logic of an entire account to a contract, covering all assets inside it until reset. This is why a compromised delegation poses far greater risk than a compromised approval.

In the Binance EIP-7702 hack on October 29, 2026, an attacker used signed EIP-7702 authorizations to point Binance's Ethereum hot wallet to a malicious contract, resulting in a loss of billions of dollars. The attack occurred in four steps: signing, pointing, sweeping, and resetting. The critical detail is that the delegation required the wallet's valid signature, indicating a potential leak or a malfunctioning signing system.

Binance has not yet published the root cause of the hack. Two possible explanations are a leaked private key or a signing system that approved the delegation without properly decoding it. If funds also left on other blockchains without EIP-7702 support, it may suggest a signing-side failure.

For users, the safety of their funds on exchanges depends on factors like reserves and protection funds. While the immediate risk from EIP-7702 has been noted, the overall security of an exchange's hot wallet depends on various factors and should be considered on a case-by-case basis.