Zcash Price Rebounds 45% as Ironwood Upgrade Aims to Resolve Counterfeiting Bug

Zcash (ZEC) has staged a strong recovery after suffering a sharp decline last week, with the privacy-focused cryptocurrency climbing approximately 45% from its recent low near $300. As of Monday, ZEC was trading around $437, according to CoinDesk data, although the token remains down about 22% over the past seven days.

The rebound follows a major development in the Zcash ecosystem after developers proposed a solution to a critical security flaw that triggered widespread concern among investors. The vulnerability, discovered in the network’s Orchard pool, was disclosed by Shielded Labs, a nonprofit organization involved in Zcash development. The Orchard pool is responsible for enabling Zcash’s privacy features by concealing transaction details from public view.

According to developers, the bug had existed undetected since 2022 and could have potentially allowed an attacker to generate unlimited counterfeit ZEC tokens without detection. The flaw also raised concerns that fraudulent coins could be withdrawn from the protocol’s shielded pool, creating significant risks for the network’s integrity and token supply.

In response, Shielded Labs, the Zcash Foundation, and the Zcash Open Development Lab collaborated on emergency fixes and coordinated rapid network upgrades with major mining pools, including ViaBTC and Foundry. Their efforts resulted in a proposed solution called Ironwood, unveiled on June 6.

The Ironwood upgrade would introduce a new privacy pool built on repaired code while preventing the creation of additional coins within the existing Orchard pool. Once implemented, node operators and network participants will be able to verify the total ZEC supply independently by calculating balances across all pools, eliminating the need to rely solely on developer assurances.

The proposal may also help determine whether the vulnerability was ever exploited. As users transfer funds from the old pool, any counterfeit tokens could either be exposed during the migration process or become permanently trapped and effectively destroyed. Shielded Labs has stated that it considers exploitation of the bug unlikely.

The Ironwood proposal has attracted attention beyond the Zcash community. Investor Chamath Palihapitiya highlighted the plan in his newsletter, noting that it would allow anyone running a node to verify that the cryptocurrency’s supply remains accurate and uncompromised.

While developers have not announced a specific launch date for the upgrade, they emphasized that testing, implementation, and network-wide coordination are still ongoing. The successful deployment of Ironwood is expected to play a key role in restoring confidence in Zcash and reinforcing the long-term security of the privacy-focused blockchain network.