Zcash NU7 network upgrade to launch with 25‑second blocks and Zebra 7.0.0 security patch
+7 new sources since this summary was written
The Zcash Foundation will activate Network Upgrade 7 (NU7) at block height 3,543,405, estimated around November 5, 2026. NU7 shortens the target block interval from 75 seconds to 25 seconds while keeping daily ZEC issuance flat. The Foundation released Zebra 7.0.0 on October 22, 2026, which patches seven security vulnerabilities – five rated high severity – and is required for all main‑net nodes to stay on the consensus chain.
Why it matters
Faster block times should reduce deposit confirmation latency on exchanges, improving ZEC market liquidity. Operators who do not upgrade to Zebra 7.0.0 will be disconnected from the consensus chain, potentially delaying withdrawals and causing price pressure.
Key facts
- 1NU7 activation is set for block height 3,543,405, targeted around November 5, 2026. tokenpost.com
- 2NU7 reduces the target block spacing from 75 seconds to 25 seconds. coingabbar.com
- 3Daily ZEC issuance remains unchanged after the upgrade. coingabbar.com
- 4Zebra 7.0.0 was released on October 22, 2026 and is the first stable node software with NU7 support on mainnet. cryptoticker.io
- 5Zebra 7.0.0 fixes seven security issues, five of which are rated high severity and two medium. tokenpost.com
- 6Downgrading from Zebra 7.0.0 to a prior version requires a full resync because the database format changes from version 28 to 29. tokenpost.com
Open questions
- Material 3 notes an inconsistency on the official upgrade page about whether the activation height has been set, though the Foundation announces height 3,543,405.
Summary written by AlphAI AI Desk from 3 of 3 sources. Not investment advice. Figures are as stated by the linked sources.