Helius CEO Turns 'Extremely Bullish' On Zcash

Mert Mumtaz, CEO and co-founder of Solana infrastructure firm Helius Labs (@mert), has declared himself "extremely bullish" on Zcash $ZEC following the proposal of a major network upgrade known as Ironwood, describing its scope as an ambitious response to the crisis that rattled the privacy coin market last week.

A Critical Bug and a Confidence Crisis

The backdrop to Mumtaz's optimism is one of the more serious security incidents in Zcash's history. The vulnerability was discovered on May 29 by security engineer Taylor Hornby using Anthropic's Opus 4.8 AI model and patched in an emergency fix by June 1. It resided in two lines of code within the Orchard circuit, the cryptographic component governing Zcash's shielded transactions, and allowed a malicious actor to create counterfeit ZEC inside the shielded pool with no on-chain signature.

What made the situation particularly complex for markets was Shielded Labs' acknowledgement that it could not say for certain whether the bug had been exploited before the fix, given Zcash's inherent privacy properties. The disclosure triggered a sharp selloff. CoinGecko data showed Zcash's market capitalisation falling from about $10.5 billion to nearly $5 billion after the vulnerability became public, before recovering toward $7.5 billion as emergency fixes and the Ironwood proposal were introduced.

The Ironwood Proposal and What It Changes

On June 6, the same developer groups formally proposed Ironwood, a plan to restore users' ability to confirm the coin's supply is sound. Ironwood would create a new privacy pool using the repaired code and block the creation of new coins in the old Orchard pool. Once it activates, anyone running the Zcash software could add up the balances across pools and confirm that no more than the correct amount of ZEC exists.

As coins migrate out of the old pool, any counterfeit ZEC would either be exposed when it tried to leave or be stranded and destroyed, potentially revealing whether the flaw was ever exploited, though developers say abuse is unlikely. Developers have not given a firm timeline for the upgrade, saying the work to build, test, and coordinate it across the network could take longer than expected.

Mumtaz, who has been one of Zcash's most vocal public supporters in recent months, said the proposed network changes directly address a core tradeoff between privacy and auditability. He added that the upgrade features new transaction logic to prevent similar bugs from arising in the future, while downplaying Zcash's recent price plunge as moves that "happen all the time" in crypto. The proposal has also drawn attention beyond the Zcash community. Investor Chamath Palihapitiya described Ironwood as a way for anyone running a node to tally the balances across pools and "verify the supply is clean."

Sources:
Decrypt: 'Extremely Bullish': Zcash Rebounds Amid Planned Fix for Supply Conundrum
CoinDesk: Zcash Bounces ~45% as Developers Propose Ironwood Upgrade
Decrypt: ZEC Crashes 38% as Zcash Discloses 'Critical Counterfeiting Vulnerability'