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74 Greed

Zano rolls back blockchain one month after Gateway Address exploit

Zano rolls back blockchain one month after Gateway Address exploit Image: Cointelegraph
Image via Cointelegraph.

Zano restarted its blockchain at block 3,833,000, immediately before the Hard Fork 6 that introduced Gateway Addresses. A vulnerability in the feature allowed unauthorized ZANO and Freedom Dollar (fUSD) to enter circulation. The rollback erases roughly one month of legitimate blockchain history alongside the unauthorized tokens. Participating nodes, miners, stakers and exchanges must adopt the update for recovery to take effect. The core team is working to account for losses and will publish a reimbursement and claims process.

Key points

  1. A Gateway Address flaw allowed unauthorized ZANO and Freedom Dollar (fUSD) to enter circulation.
  2. The rollback erases roughly one month of legitimate blockchain history alongside the unauthorized tokens.
  3. Nodes, miners, stakers and exchanges must adopt the update for network recovery to proceed.
  4. The exploit risked breaking ZANO's fixed supply promise via unlimited unauthorized token creation.

Why it matters

The rollback invalidates all transactions from the past month, requiring users and services to reconcile activity. Unauthorized token creation risked diluting ZANO's fixed supply, impacting all holders.

What's unclear

No publication date has been announced for the technical post-mortem of the Gateway Address exploit
No timeline has been set for restoring Gateway Address functionality to the Zano network

Price context · ZANO

At publication
$6.35
Now
$6.35
Change since
+0.00%
7 days · dashed line = publication

Sources · 2 publishers

Cointelegraph Tier 1 First report
Zano rolls blockchain back a month after Gateway Address exploit
CoinCentral Tier 3
Zano Blockchain Rolls Back One Month After Gateway Address Exploit

Coverage timeline

  1. First reported by Cointelegraph
  2. Confirmed by CoinCentral
  3. CryptoVideos brief published
How this brief was made. Our system found this event in 2 independent publications, summarised two complete reports with AI and checked every number above against the source text. Sources are linked in full. Not financial advice. Report an error

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