Zano Exploit Forces Rollback After Fake ZANO Minting
The Zano exploit exposed a Gateway Address validation flaw introduced in Hard Fork 6. The attacker paid only 100 ZANO, worth about $553 at the time, to register a gateway address and mint roughly 36.9 million counterfeit ZANO over two events on 29 August and 25 September. The attacker also created about 1.8 trillion fUSD stablecoins.
The counterfeit assets behaved like legitimate tokens and could be transferred or traded normally. Zano said the incident potentially affected 117,941 outputs and 65,301 transactions. The project rolled back about one month of blockchain history from block 3,833,000, disabling Gateway Addresses and removing the illicit supply. It said the total ZANO supply and issuance schedule would remain unchanged.
The rollback also reverses legitimate transactions made during the affected period. Zano plans to restore user balances using developer funds, team members’ personal funds and external donations. Exchanges and payment providers are expected to replay or reimburse affected deposits and withdrawals. Zano said limited liquidity may have prevented the attacker from selling the counterfeit tokens at scale.
The Zano exploit is bearish for ZANO in the short term because it undermines confidence in token supply integrity, gateway security and blockchain immutability. Traders should monitor exchange reopening notices, liquidity, wallet balances, compensation progress and the project’s root-cause analysis. Longer term, confidence may depend on whether Zano delivers a credible security fix and completes the rollback recovery.
Bearish
The Zano exploit is likely to pressure ZANO in the short term. The unauthorised minting of about 36.9 million ZANO raises immediate concerns about supply integrity and may encourage selling, particularly when exchanges reopen deposits and withdrawals. The creation of 1.8 trillion fUSD also highlights weaknesses in the project’s gateway and token issuance controls.
The rollback removes the illicit assets, but it also reverses legitimate transactions and temporarily disrupts trading, payments and exchange operations. These effects can reduce liquidity and increase volatility. The project’s plan to restore affected balances may limit losses for users, while limited liquidity may have prevented a larger market sell-off.
Over the longer term, ZANO could recover if the security flaw is fully fixed, compensation is completed and exchanges confirm that balances and transaction histories are reliable. However, the loss of confidence in blockchain immutability and governance creates a continuing valuation risk. Similar exploits and chain reorganisations have historically produced sharp short-term declines, with recovery depending on transparent remediation and restored market access.