Hi,
Because you have not provided the model for a long time, the following provides common processing methods.
1. If you are using a home router, hold down the reset button( or hole) on the router to reset it and then use the default password (usually found at the bottom of the router) to log in to the router. If the fault persists, please contact the hotline for help.
You can get the regional hotline number at
https://consumer.huawei.com/en/support/hotline2. If you are asking about an enterprise-level router, run the local-user command to change the password.
For details, see
https://support.huawei.com/hedex/hdx.do?docid=EDOC1100007335&id=local-user&lang=enAny further questions, let us know.