- Zcash quickly fixes critical vulnerability in Orchard.
- ZEC reacts after sharp market drop.
- Ironwood emerges as a new protected pool with audits.
Zcash went through one of the most delicate episodes in its recent history after a critical vulnerability was identified in the protected Orchard pool. The flaw raised concerns about the possibility of unlimited issuance of counterfeit ZEC, putting pressure on the price and investor confidence.
Josh Swihart, founder of the Zcash Open Development Lab (ZODL), detailed that the team executed a two-step emergency response to contain the problem. According to him, the first move was the implementation of a soft fork, designed to temporarily disable Orchard transactions.
The measure sought to reduce the “risk of exploitation without revealing the full extent of the problem before responsible disclosure,” as Swihart explained. Subsequently, the team activated a broader update, the NU6.2 hard fork, on June 3rd.
This second phase aimed to correct the structural flaw and restore the Orchard pool to working order. The pool is central to the Zcash ecosystem, enabling private transactions based on zero-knowledge technology.
The vulnerability had been disclosed by Shielded Labs, which indicated the potential risk but stated that actual exploitation was unlikely. Even so, the impact on the market was immediate.
The price of ZEC plummeted by more than 50%, falling from around US$630 to lows near US$303. The movement reflected investor fears about potential security weaknesses in the protocol.
Among the most notable reactions, Arthur Hayes, co-founder of BitMEX, decided to completely liquidate his position in ZEC after the problem was made public. The decision reinforced the cautious mood in the market.
In the following days, the asset began to recover. ZEC advanced 13,5% in 24 hours, reaching US$428,67, which represents a 41,5% increase from its recent low.
Swihart highlighted the lessons learned from the episode: “We solved the problem, put our incident support processes to the test, strengthened relationships with others who support the network, tested our own resilience, and came together as a community of developers to agree on a way forward.”
In addition to the immediate response, ZODL is already working on structural improvements. The team has proposed the development of Ironwood, a new protected pool focused on independent audits and formal verification.
“Ironwood is the next step in strengthening the Zcash protocol,” the team stated, indicating that the initiative will have the support of organizations such as Tachyon, Valar Group, Zcash Foundation, and Shielded Labs.













