Zano Erases One Month Of Blocks After Gateway Address Exploit

One month of transactions evaporated Monday at 06:00 UTC when Zano node operators coordinated a network restart at the block immediately preceding Hard Fork 6. The coordinated state reset rewound four weeks of ledger records following a security breach of the network's Gateway Address architecture. For traders seeking the Zano blockchain rollback explained, the action resets the entire ledger to the state recorded prior to the upgrade. Every transaction confirmed between the activation of Hard Fork 6 and Monday morning no longer exists on the official chain.

The Gateway Address exploit mechanism

A blockchain rollback (reverting node software to an earlier historical state) is the most severe remediation tool available to a network. The intervention targets an exploit rooted in Hard Fork 6 (a mandatory software upgrade that altered consensus rules). That upgrade introduced Gateway Addresses, which function as dedicated deposit routers to move assets across system boundaries. An attacker discovered a vulnerability in the Gateway Address processing logic, permitting unauthorized balance creation directly inside the state machine. To eliminate the illegitimate balances, validators agreed to wipe out the software state that allowed them. Running the node client at the pre-fork block height effectively purged the exploit code from consensus. CoinGecko tracked total crypto market cap at $2.87T at 08:00 UTC Monday, reflecting a 3.78% decline across 24 hours. The Zano disruption arrived as broader digital asset liquidity faced selling pressure, with 24-hour volume reaching $110.5B.

Ledger invalidation across 30 days of blocks

Rewinding 30 days of blocks breaks transaction finality (the guarantee that confirmed blocks cannot be modified or deleted). While the rollback successfully deletes the attacker's illicit balances, it treats legitimate user operations as collateral damage. Users who purchased tokens on secondary platforms or received native transfers throughout September find their wallets reverted to August balances. Mining rewards and staking yields earned during that four-week window are similarly nullified. Centralized exchanges face direct accounting mismatches. If an exchange credited a deposit made during the erased period and allowed an off-chain withdrawal, the deposited coins on the Zano chain no longer exist.

Settlement guarantees across crypto markets

Coordinated rewinds of this duration are rare in decentralized networks because they expose node centralization. If validator sets can agree to erase a month of history, settlement finality becomes conditional rather than absolute. The event leaves developers rebuilding the Gateway Address routing logic without the underlying consensus bug. Node operators must now run patched software versions that maintain pre-fork consensus rules until developers write a safe replacement upgrade. Market participants now monitor exchange wallet reconciliations and node participation metrics to verify whether alternative forks emerge from dissenting miners.