Zcash Patches Orchard Soundness Flaw; NU6.2 Activated June 3 as ZEC Defends $600

Zcash shipped an emergency upgrade to fix a critical soundness issue in the Orchard shielded pool that could have enabled invalid state transitions and potential double-spends. The bug was disclosed on May 29, a revised patch activated on June 2, and the NU6.2 hard fork completed on June 3 to restore Orchard with the corrected code. ZEC later retested the $600 area and was quoted at $612 at the time of writing, up 9.5% on the week.