Privacy Chain Zano Just Deleted a Month of Transactions to Undo a Hack — Inside the Most Radical Recovery in Crypto This Year

Privacy blockchain Zano has restarted its network from block 3,833,000, erasing roughly one month of transaction history after a Gateway Address vulnerability allowed unauthorized ZANO and Freedom Dollar tokens to enter circulation — one of the most aggressive recovery moves the crypto industry has seen this year.

By Priya Sharma | September 28, 2026

The Hook: When the Cure Is Rewinding the Patient a Month

Zano’s core team announced Sunday that the chain would restart from block 3,833,000 — the block immediately before Hard Fork 6, which activated the Gateway Address feature in August. In practice, that means every transaction confirmed during the affected month no longer forms part of the recovered blockchain. If that sounds drastic, it is: rather than absorbing the losses from illegitimately minted tokens, the project chose to rewrite history and start again from a clean checkpoint.

The market reaction was immediate. ZANO fell more than 12 percent over 24 hours as the recovery process continued over the weekend, and MEXC suspended ZANO and FUSD deposits and withdrawals while services migrate to the recovered chain. For holders, the message from the team was direct: keep your transaction IDs and trading records, and check the status of earlier transfers before sending payments again.

On-Chain Evidence: What the Vulnerability Actually Did

According to the project’s investigation, the Gateway Address vulnerability enabled unauthorized ZANO and fUSD — Freedom Dollar, the network’s stablecoin — to enter circulation. Crucially, the team found no compromise of wallet spend keys. In everyday terms: nobody’s private wallet was broken into. The bug lived in a feature designed for businesses, and the fix is surgical — an emergency software release that removes activity created through the vulnerable feature while leaving ordinary transactions untouched.

• Block 3,833,000 — the restart checkpoint, immediately before Hard Fork 6
• August 26 — when Hard Fork 6 activated Gateway Addresses on mainnet
• More than 12 percent — ZANO’s 24-hour decline during the recovery
• Version 2.2.3.600 — the emergency software release for nodes, miners and services

Gateway Addresses were built for exchanges, bridges and payment providers that found Zano’s normal unspent transaction output model — a privacy-preserving design where wallets track unspent coins rather than balances — difficult to integrate. The new addresses kept an account-style balance directly on the blockchain, and registration required a one-time fee of 100 ZANO, which the protocol permanently burned. Forum records show at least two Gateway Addresses were registered during the feature’s first week on mainnet.

The Core Conflict: Immutability Versus Survival

Here is the philosophical fault line. Crypto has always sold itself on immutability — the blockchain is truth, and nobody can rewrite it. A rollback breaks that promise, even for good reasons. Transactions some users made in good faith during the affected month simply no longer exist on the recovered chain. If you bought goods with ZANO in September, the seller’s record of that payment has effectively vanished from the network’s official history.

But the alternative was worse. Unauthorized tokens flooding circulation would dilute every honest holder and destroy the stablecoin’s credibility. Zano says reimbursement for affected parties will use developer, team and large-holder funds — without issuing additional ZANO tokens, which rules out the inflationary “print to compensate” approach that has destroyed other projects. The team has not yet released its promised technical post-mortem explaining precisely how the vulnerability produced unauthorized assets.

Market Implications: One Important Limit You Should Know

The rollback has hard limits. It cannot reverse transactions completed outside Zano. Assets already settled as USDT, DAI or other tokens on separate networks remain outside the reach of the chain restart, according to the project. That matters for anyone who traded the minted tokens on other platforms — those trades stand, and untangling them will be a manual, case-by-case process.

The recovery also requires coordination: miners, stakers, nodes, exchanges, pools and other services must all install the updated software and follow the recovered chain. The team urged operators to verify published checksums, while ordinary wallet users can install the updated wallet without entering their seed phrases — a sensible anti-phishing safeguard during any crisis.

The Verdict

Zano’s rollback is a reminder of a trade-off small chains face: decentralization rhetoric versus the practical reality that a small team can still marshal enough miners and services to rewrite the ledger when survival is at stake. For investors, the lessons are straightforward — privacy features add attack surface, new “convenience” upgrades deserve skepticism in their first months, and funds that left the chain before the rollback are gone from its reach. Watch whether the promised post-mortem and the developer-funded reimbursement actually arrive. Until then, treat ZANO’s 12 percent dip as the market pricing in both the damage and the uncertainty.

The cryptocurrency market remains highly volatile. This article is for informational purposes only and does not constitute financial advice.