Zcash Suffers 36% Drop Following Critical Orchard Security Flaw – Investors Eye $367 Support Level
The cryptocurrency Zcash ($ZEC) has experienced a significant decline, falling more than 36% from its recent highs, after developers disclosed a critical security vulnerability within the network’s Orchard shielded pool. This sharp drop has brought the token’s price closer to a key long-term support zone around $367, attracting the attention of investors and traders.
Discovery and Emergency Response to Security Flaw
On May 29, security engineer Taylor Hornby identified a critical weakness affecting the cryptographic circuits of Zcash’s Orchard shielded pool, a privacy feature that protects transaction data. The vulnerability involved a flaw in the elliptic curve multiplication check — a key cryptographic operation underlying the creation and verification of shielded transactions.
Hornby, supported by the Claude Opus 4.8 model from AI research company Anthropic, developed a proof-of-concept exploit demonstrating that this flaw could allow an attacker to generate fake ZEC coins undetectably within an Orchard wallet. After Hornby reported the issue to Zcash developers, a swift emergency hard fork was activated on June 3 to patch the vulnerability and mitigate risk.
Market Impact: Price Plunges and Capital Losses
Despite the rapid intervention, the disclosure triggered a sharp market reaction. ZEC was trading shortly over $611 earlier this week but tumbled to about $390 on Thursday, wiping out over $3 billion (approx. €2.6 billion) from its market capitalization.
Technical data from Shielded Labs confirmed the exploit’s basis in the Orchard shielded pool cryptographic logic, raising concerns about the potential for undetectable counterfeit coin generation prior to the patch.
Investor and Trader Concerns Amid Uncertainty
While developers have addressed the security hole, lingering uncertainty remains because the privacy-centric design of Orchard makes it cryptographically impossible to verify whether the vulnerability was exploited before the fix. Shielded Labs has stated they are not overly concerned about prior exploitation since the bug survived years of expert code review and required advanced AI-assisted analysis to uncover.
Nevertheless, investors appear cautious. Market data reveals that ZEC has dropped below its 20-, 50-, and 100-day exponential moving averages (EMAs), signaling bearish momentum. The next critical support zone is near the 200-day EMA at approximately $367, which also aligns with a historically high-volume trading range.
Technical Indicators Highlight Growing Downside Pressure
Momentum indicators reinforce the bearish outlook. The daily Relative Strength Index (RSI) fell to around 37, the lowest in several weeks, indicating increased selling pressure though not yet reaching oversold territory (below 30). Bollinger Bands demonstrate how stretched the recent price move has become, with ZEC sitting near the lower band after losing its middle band during the sell-off.
Data from Coinglass shows that many leveraged long positions have been liquidated during the decline, with remaining liquidation clusters now concentrated between $430 and $550. These zones may provide resistance or support if buying interest returns.
If the $367 support does not hold, traders could shift focus to a historically active volume cluster between $220 and $260, where ZEC traded sideways for several months earlier this year.
Community and Industry Reactions
Not all experts believe the worst-case scenario has materialized. Arthur Hayes, BitMEX co-founder, noted that while there is no formal cryptographic proof that the counterfeit coin creation occurred, he found the risk sufficient to sell his entire ZEC holdings. Hayes described the situation on social media platforms as “The Holy Trinity is dead,” referring to sales in Zcash, Hyperliquid, and Near Protocol this week.
Industry voices also point out that complex zero-knowledge privacy protocols like Orchard commonly face similar, hard-to-detect risks. Mert Mumtaz, CEO of Solana infrastructure firm Helius, remarked that comparable vulnerabilities resurface every few months as newcomers gain a deeper understanding of privacy pool mechanics.
Historical Context and Forward Outlook
This incident is not the first cryptographic concern for Zcash. Back in 2018, the Electric Coin Company fixed a cryptographic vulnerability related to zk-proofs without reported coin losses.
Currently, Shielded Labs and Zcash developers collaborate on a forthcoming network upgrade aimed at enabling users to cryptographically verify the integrity of ZEC supply and confirm the absence of counterfeit coins within the Orchard pool.
Conclusion
The revelation of the Orchard shielded pool security flaw has delivered a jarring blow to Zcash’s price and shaken investor confidence, bringing the token down by over a third. While the vulnerability is now patched, uncertainty remains regarding undisclosed exploitation. Traders are closely monitoring key technical support near $367, with the market awaiting clearer signals on whether recovery is possible or further declines lie ahead.
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