Zcash experienced significant disruption after a critical security vulnerability was found in its Orchard shielded pool, which had the potential to allow undetectable counterfeit ZEC coins for about four years. Developers moved quickly to address the issue, initially disabling Orchard activity through an emergency soft fork and later implementing a permanent solution via the NU6.2 hard fork. No evidence of actual exploitation, loss of user privacy, or supply integrity breaches was found, and the incident has sparked an industry-wide discussion about the security and transparency of shielded transaction pools. Anton ... (full story)