Zcash to upgrade mainnet on July 28 to fix infinite minting bug

The Zcash Ironwood mainnet upgrade is set to activate at 12:00 p.m. UTC on July 28, at block height 3,428,143, according to Zcash core developer Sean Bowe. This upgrade will focus on eliminating a vulnerability in the Orchard pool that could have potentially allowed an attacker to infinitely mint counterfeit ZEC.