Zcash plunges 38% as Orchard counterfeiting risk sparks supply doubts

| cryptobriefing.com
Zcash (ZEC) fell about 38% after a critical counterfeiting vulnerability was disclosed in its Orchard shielded pool on June 5, 2026. The flaw, reportedly present in Zcash code for around four years and found during a Shielded Labs audit on May 29, could have enabled attackers to mint unlimited ZEC inside Orchard without detection. Zcash responded quickly. Between June 2 and June 3 it completed emergency steps, including a hard fork and temporarily disabling Orchard. While the patch was already in place before public disclosure, confirming whether exploitation happened during the four-year window is effectively unprovable due to privacy-by-design. Market impact was immediate. ZEC traded near $442.60 lows, and volumes reportedly dropped up to 57% as liquidity tightened. Arthur Hayes liquidated his entire ZEC position, highlighting how narrative and trust shocks can drive fast repricing. For traders, the key issue is supply integrity. If counterfeit Zcash were minted, holders could face dilution without definitive on-chain proof. With “no exploitation” hard to verify, ZEC remains exposed to ongoing sentiment volatility until further technical disclosure or audits clarify the scope.
Bearish
The news is bearish for ZEC because it directly challenges trust in supply integrity. Even though Zcash patched Orchard via emergency measures and a hard fork, the privacy design makes it difficult to prove that no exploitation occurred during the multi-year window. That uncertainty tends to trigger immediate selling, wider spreads, and lower liquidity—evidenced by the sharp drawdown, volume drop, and a prominent early exit by Arthur Hayes. In the short term, traders are likely to de-risk ZEC on uncertainty and reputation damage, keeping volatility elevated until technical disclosures or independent audits provide clearer scope. In the long term, ZEC’s sentiment could stabilize only if follow-up findings convincingly rule out counterfeiting or quantify exposure. Until then, the market is likely to apply a persistent “confidence discount,” maintaining downside pressure.