If the target is a default ISP router where the password format is known (e.g., 8 numeric digits, or 10 alphanumeric uppercase):
Wait for a genuine client to associate or deauth/reassoc cycle. Use aireplay-ng -0 2 -a AP_MAC -c CLIENT_MAC wlan0mon to force a fresh handshake. If the target is a default ISP router
The error message typically occurs when using automated Wi-Fi auditing tools like Wifite2 . It indicates that while the tool successfully captured a WPA/WPA2 4-way handshake, the password for that network was not found in the default dictionary file being used. Understanding the Error 8 numeric digits