If you tried moving your ZEC today and hit a wall, you’re not alone. Multiple cryptocurrency exchanges have paused Zcash deposits and withdrawals ahead of the network’s NU6.2 mainnet upgrade, scheduled to resume services after the activation completes tomorrow at 9am ET.
Exchanges including Bitget and Blofin are among the platforms that temporarily suspended ZEC transactions to protect users during the transition period, a standard playbook when blockchain networks undergo hard forks.
What NU6.2 actually fixes
NU6.2 is a hard fork designed to fix a severe soundness bug discovered in Zcash’s Orchard shielded transaction circuit. The upgrade activates at mainnet block height 3,364,600. Once live, it re-enables Orchard functionalities with a freshly updated circuit and a new verifying key, essentially replacing the compromised component with a patched version.
The Zcash Foundation released two pieces of software to handle the situation. Zebra version 4.5.3 served as an emergency soft fork, a quick temporary fix. Zebra version 5.0.0 is the full NU6.2 activation package that goes live with the hard fork.
