Zcash Activates Ironwood Upgrade to Address Orchard Shielded Pool Vulnerability
The privacy-focused cryptocurrency network Zcash has formally deployed its Ironwood network upgrade (designated as Network Upgrade 6.3 or NU6.3). Scheduled to activate at mainnet block height 3,428,143 on July 28, 2026, the upgrade implements a structural solution to a critical zero-knowledge circuit vulnerability discovered in the legacy Orchard shielded pool.

















































