A critical vulnerability was discovered in one of Zcash’s private transaction pools, a core feature of the privacy-focused blockchain. The bug, which had existed for four years, could have allowed unlimited minting of counterfeit ZEC tokens. Although the issue was patched earlier this week, the news triggered a massive selloff, sending ZEC down more than 40% in a single day.
The native token fell 35% in the last 24 hours, trading at around $339 at press time. During the selloff, it briefly dipped below $300, its lowest since early April. That wiped billions from its market cap. Before the crash, ZEC had rallied from under $200 in March to as high as $675 in late May. Now those gains are gone.
Uncertainty Drives Panic
The ferocity of the drop stems partly from uncertainty. While the vulnerability has been patched, it is not yet known if malicious actors exploited it to mint fake tokens. “The price reaction reflects that uncertainty more than the bug itself,” said Nicolai Sondergaard, a research analyst at Nansen. “A -30% move is the market assigning non-trivial probability to the scenario where some counterfeiting did occur and is permanently undetectable.”
Bitwise Research Analyst Ish Asad noted the timing was particularly bad. “The news came when the privacy narrative was surging and ZEC was up about 3x since April,” he said. “As a result, it plummeted 40%.”
Recovery Looks Unlikely Soon
Regaining recent highs soon seems unlikely, according to Jake Kennis, a senior research analyst at Nansen. He pointed to the size of the price drop and the heavy trading volume — over $3 billion in the last 24 hours. “It would likely require a broader privacy coin narrative, a major protocol-level catalyst, or larger rotation into privacy assets,” Kennis said. Typically, a token needs to “find its footing” after such a selloff before a rebound.
However, Asad suggested traders may be overreacting. “The market often gets ahead of itself and reprices in real time,” he said. “But the fundamental story does not change. Zcash is a clone of Bitcoin with added privacy features, which will have a market of its own.”
BitMex Founder Dumps ZEC Bag
BitMex founder Arthur Hayes echoed the sentiment. He announced on social media that he sold his entire ZEC position for profit, partly because “the Holy Trinity is dead” and the exploit violated his “narrative mental map.” Still, Hayes said “privacy is priceless” and would consider buying back at higher prices if Zcash recovers.
In the near term, other privacy coins are unlikely to benefit from Zcash’s fall. “A potential vulnerability in a privacy protocol like this wouldn’t be seen as a positive catalyst for its competitors,” Kennis added.
