{"id":800,"date":"2026-10-01T11:08:00","date_gmt":"2026-10-01T11:08:00","guid":{"rendered":"https:\/\/wyominginvest.com\/?p=800"},"modified":"2026-10-01T11:08:00","modified_gmt":"2026-10-01T11:08:00","slug":"zano-rolls-back-one-month-of-blockchain-history-after-critical-gateway-address-exploit","status":"publish","type":"post","link":"https:\/\/wyominginvest.com\/?p=800","title":{"rendered":"Zano Rolls Back One Month of Blockchain History After Critical Gateway Address Exploit"},"content":{"rendered":"

The Zano core team has executed a drastic network rollback, erasing approximately one month of blockchain history following a severe vulnerability that allowed unauthorized ZANO and Freedom Dollar (fUSD) tokens to flood into circulation. <\/p>\n

According to official updates shared by the project, the Zano blockchain has been successfully restarted at block 3,833,000. This specific checkpoint places the network immediately prior to the implementation of Hard Fork 6, the major network upgrade that introduced the vulnerable feature to the ecosystem. For the recovery to take full effect, participating nodes, miners, stakers, exchanges, and various infrastructure partners must adopt the newly released software update.<\/p>\n

The decision to roll back the chain comes after the development team identified a major security flaw in the network’s newly introduced functionality. Quinten van Welzen, Zano\u2019s head of marketing and growth, confirmed in statements to Cointelegraph that the scale of the security breach was massive. \u201cThe total number of unauthorized assets was considerable,\u201d van Welzen stated, highlighting the urgency that forced the core team to take unprecedented defensive measures to protect the integrity of the layer-1 network.<\/p>\n

Because the blockchain has been reverted to a state from a month ago, the rollback inevitably invalidates a month of completely legitimate transactions alongside the illicitly minted tokens. Consequently, any genuine transfers, trades, or smart contract interactions executed during that intervening period will no longer appear on the recovered, authoritative chain. Furthermore, the rollback cannot retroactively reverse payments or settlements that have already cleared on external blockchains or cross-chain bridges. To address this collateral damage, the Zano team announced that it is actively working on a comprehensive plan to account for user losses, promising to publish a formal reimbursement and claims process in the near future.<\/p>\n

Explaining the harsh realities behind the controversial decision, van Welzen emphasized that inaction would have spelled certain doom for the cryptocurrency project. In a public post on the social media platform X, he elaborated on the catastrophic implications of letting the exploit stand. <\/p>\n

\u201cDoing nothing meant unauthorized ZANO and fUSD in circulation without limit, diluting every holder and breaking the most basic promise a currency makes: a fixed supply,\u201d van Welzen wrote. He added that failing to act would have set a dangerous precedent for the broader ecosystem. \u201cIt would also tell every future attacker that exploited coins get to keep their value. No project survives that.\u201d<\/p>\n

Zano Identifies Gateway Address Exploit<\/p>\n

\"Zano<\/figure>\n

While the Zano core team has not yet published an exhaustive post-mortem technical analysis at the time of publication, developers have confirmed the exact origin of the vulnerability. The security breach stemmed directly from Gateway Addresses, a specialized architectural feature designed to streamline integrations. The feature was originally implemented to make it significantly easier for third-party bridges, centralized cryptocurrency exchanges, and merchant payment services to integrate with the Zano network by allowing them to manage funds through a single, account-style balance similar to those found on account-based blockchains like Ethereum.<\/p>\n

Before the introduction of Gateway Addresses, Zano\u2019s standard privacy-focused wallets tracked funds using Unspent Transaction Outputs, commonly known as UTXOs, rather than maintaining a single consolidated account balance. Under the traditional UTXO model, exchanges and third-party services were required to actively scan the blockchain to identify incoming payments, meticulously track those specific outputs, and selectively designate which ones to spend when processing user withdrawals or outbound transfers. The Gateway Address feature was intended to eliminate this friction, but an underlying flaw in the code permitted unauthorized entities to generate and inject unbacked tokens into circulation.<\/p>\n

Speaking with Cointelegraph, van Welzen confirmed that all active Gateway Addresses have been temporarily deactivated on the newly restarted chain. These addresses will not be restored until the underlying Gateway Address code undergoes rigorous review, independent security audits, and comprehensive testing to ensure no residual vulnerabilities remain.<\/p>\n

Zano originally launched in May 2019, positioning itself as a specialized layer-1 blockchain engineered primarily for private, confidential payments. The protocol\u2019s standard private transactions are designed to completely conceal senders, receivers, transferred amounts, and even the specific asset types involved in any given transfer. While the network operates using its native cryptocurrency, ZANO, the blockchain’s flexible architecture also allows ordinary users and developers to deploy, issue, and mint custom digital assets. Freedom Dollar (fUSD) is one such prominent custom token that operates natively on top of the Zano blockchain architecture.<\/p>\n

Reflecting on the heavy toll the network rollback takes on the project’s reputation and community trust, van Welzen did not sugarcoat the severity of the situation. <\/p>\n

\u201cRestarting the chain from before Hard Fork 6 costs a month of history, and it costs trust, which we\u2019ll have to earn back,\u201d van Welzen admitted. <\/p>\n

Despite the immediate fallout and the disruption caused to everyday users, stakers, and business partners, the core team remains steadfast in its belief that radical intervention was the only viable path forward. \u201cBut it restores the supply everyone signed up for, and it leaves a path to rebuild. Which is better than 7 years of hard work left to die. We know it hurts. But not doing it would have hurt more.\u201d<\/p>\n","protected":false},"excerpt":{"rendered":"

The Zano core team has executed a drastic network rollback, erasing approximately one month of blockchain history following a severe vulnerability that allowed unauthorized ZANO and Freedom Dollar (fUSD) tokens to flood into circulation. According to official updates shared by the project, the Zano blockchain has been successfully restarted at block 3,833,000. This specific checkpoint<\/p>\n","protected":false},"author":15,"featured_media":799,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[600],"tags":[572,52,6,201,603,304,384,857,601,275,211,610,609,602],"class_list":["post-800","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-identity-privacy","tag-address","tag-back","tag-blockchain","tag-critical","tag-cryptography","tag-exploit","tag-gateway","tag-history","tag-identity","tag-month","tag-privacy","tag-rolls","tag-zano","tag-zero-knowledge"],"_links":{"self":[{"href":"https:\/\/wyominginvest.com\/index.php?rest_route=\/wp\/v2\/posts\/800","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wyominginvest.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wyominginvest.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wyominginvest.com\/index.php?rest_route=\/wp\/v2\/users\/15"}],"replies":[{"embeddable":true,"href":"https:\/\/wyominginvest.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=800"}],"version-history":[{"count":0,"href":"https:\/\/wyominginvest.com\/index.php?rest_route=\/wp\/v2\/posts\/800\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/wyominginvest.com\/index.php?rest_route=\/wp\/v2\/media\/799"}],"wp:attachment":[{"href":"https:\/\/wyominginvest.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=800"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wyominginvest.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=800"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wyominginvest.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=800"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}