Zcash Fixes Emergency Bug as ZEC Defies Crypto Market Crash

The Zcash Foundation shipped an emergency upgrade to patch a critical bug in its Orchard shielded pool, and Zcash (ZEC) climbed even as the broader crypto market sold off.

The fix arrived through two releases, Zebra 4.5.3 and 5.0.0, which paused and then restored Orchard transactions with a corrected circuit. No funds were lost, and total supply stayed intact.

Zcash Patches a Soundness Bug in Orchard

The flaw sat in the Orchard Action circuit, the zero-knowledge system behind Zcash’s newest privacy pool. If exploited, it could have let value be created without detection.

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Earlier upgrades had pushed record amounts of ZEC into shielded pools, raising the stakes for any Orchard flaw. Both releases shipped within days of the discovery.

Zebra 4.5.3 disabled Orchard actions through an emergency soft fork at block height 3,363,426. Zebra 5.0.0 then activated the NU6.2 hard fork at block 3,364,600 and switched Orchard back on.

The Foundation said it caught the flaw before any known exploitation. Transparent and Sapling transactions kept working, so user privacy was unaffected. The team urged every node operator to upgrade to 5.0.0.

Why the Network Looked Offline

Reports claimed Zcash had stopped producing blocks for hours. Several explorers showed the chain stuck near height 3,364,601 during the upgrade window, and social posts amplified the confusion.

The halt was only apparent. Mining pools kept producing blocks under the new rules while lagging explorers resynced.

By midday on June 3, most had caught up to the upgraded consensus.

ZEC Holds Up as Markets Fall

ZEC traded for $596 as of this writing, up by over 5% over 24 hours, according to market data. The token ranged between $560 and $638 on the day, while Bitcoin and other large caps slid.

Its market value sits near $9.9 billion, placing ZEC around 13th by capitalization. The strength fits a wider rotation into privacy assets that has lifted the token in recent months.

Growing institutional interest has tracked rising demand for privacy. Talk of ETF prospects for ZEC has added to the momentum, though approval is far from certain.

The incident tested Zcash’s coordination more than its order book. Some analysts have floated higher long-term targets, but those calls stay speculative until operators cleanly finish the move to 5.0.0.

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