Key facts
- Zcash price fell over 50% in 24 hours, erasing $5 billion in market cap.
- The decline is linked to a counterfeiting vulnerability in the Orchard shielded pool.
- The vulnerability, discovered by Taylor Hornby, theoretically allowed counterfeit ZEC minting.
- A fix was implemented on June 2, but the privacy design hinders supply verification.
- The Zcash development team states no counterfeit ZEC was minted.
- A proposed network upgrade, Ironwood, aims to restore supply verification.
Zcash has experienced a dramatic price collapse, losing over half its value and erasing $5 billion in market capitalization within 24 hours. This sharp decline is attributed to fears surrounding a recently disclosed counterfeiting vulnerability in the Orchard shielded pool. Security researcher Taylor Hornby identified the issue, which theoretically allowed for the creation of counterfeit ZEC without detection. Although the vulnerability was patched on June 2, Zcash's privacy-centric design makes it difficult to independently verify if any counterfeit coins were minted before the fix. This lack of verifiability has fueled uncertainty and panic among traders. The Zcash development team maintains that no fake ZEC was minted and that the issue did not affect user funds or privacy. To address these concerns and restore confidence, Shielded Labs is exploring a network upgrade called Ironwood, proposed by ZODL, which aims to enable participants to verify the integrity of Zcash's total supply. This upgrade is targeted for activation in late July 2026. Cameron Winklevoss, Co-Founder of Gemini, framed the incident as a positive signal of the community's focus on continuous improvement and security research.