858 B
Zecwallet-cli BIP39 derivation bug
In v1.0 of zecwallet-cli, there was a bug that incorrectly derived HD wallet keys after the first key. That is, the first key, address was correct, but subsequent ones were not.
The issue was that the 32-byte seed was directly being used to derive then subsequent addresses instead of the 64-byte pkdf2(seed). The issue affected both t and z addresses.
Note that no funds are at risk. The issue is that, if in the future, you import the seed into a different wallet, you might not see all your addresses in the new wallet, so it's better to fix it now.
Fix
If you start a wallet that has this bug, you'll be notified.
The bug can be automatically fixed by the wallet by running fixbip39bug
If you have any funds in the incorrect addresses, they'll be sent to yourself, and the correct addresses re-derived.