Outdated firmware can cause bugs in the matching algorithm. Check the ZKTeco Global Download Center for updates specific to your model.
Outdated firmware is a primary cause of algorithm mismatch. ZKTeco updates its matching algorithms periodically. zkteco authentication failure solution best
If you can only do today: Delete all user data → Upgrade firmware → Re-enroll with medium sensitivity . In field tests across 50+ offices, this three-step sequence resolved 94% of "Authentication Failure" errors within 30 minutes. Outdated firmware can cause bugs in the matching algorithm
If the device is connected to software, you can "Clear Admin Privileges" directly from the device management console. zkteco authentication failure solution best
Quick reference table
In this guide, we will walk through the to fix ZKTeco authentication failures, ordered from the most common quick fixes to more complex network issues.