Zcash (ZEC) Recovers After Critical Bug Sparks 60% Flash Crash

Zcash (ZEC) surged more than 23% over the past 24 hours, rebounding to around $445 after a sharp selloff that briefly erased over 60% of its value. The recovery follows a coordinated emergency response to a critical vulnerability in the network’s Orchard shielded pool, which had raised concerns about the potential unlimited minting of counterfeit ZEC.

ZEC price turbulence unfolded after security researchers from Shielded Labs disclosed that the flaw could have allowed undetected inflation within Zcash’s privacy layer. 

Although the bug was reportedly fixed before exploitation occurred, the announcement triggered a steep market reaction, sending ZEC down from roughly $630 to near $250 at its lowest point.

The incident prompted an urgent response from the Zcash development ecosystem, led by the Zcash Open Development Lab (Zcash Open Development Lab). 

According to founder Josh Swihart, the team deployed a two-stage emergency upgrade designed to contain risk while preserving network integrity.

The first step involved a soft fork that temporarily disabled Orchard transactions, limiting exposure while the vulnerability was being assessed. This precaution was intended to reduce the risk of exploitation without fully disclosing technical details before responsible coordination with stakeholders.

A second phase followed with the activation of a hard fork (NU6.2), which patched the actual code error and turned Orchard transactions back on safely.

Swihart noted that the development team engaged in rapid code reviews with ecosystem partners to verify integrity across implementations. 

The disclosure initially rattled investor confidence, particularly among traders aligned with the privacy narrative around Zcash. The selloff also raised broader concerns about the resilience of zero-knowledge systems under real-world stress.

Arthur Hayes said he fully exited his ZEC position after the announcement, highlighting rising risk sensitivity among large holders.

Despite the volatility, ZEC has since recovered part of its losses, rebounding 43% from its recent low of about $300.

The incident highlights how even mature privacy-focused blockchain networks like Zcash (ZEC) remain vulnerable to critical software flaws that can threaten token economics and investor confidence.

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