Open the URL: https://www.password.ethz.ch/ and enter your credentials.

In case you have lost your main ETH password and cannot login here, please send an email to irl-support@ethz.ch and we will do it for you

Click on ‘Self service’

Check the box about ‘Wifi, eduroam, etc’

Set the new password.

For more information, please check: https://ethz.ch/services/en/it-services/service-desk/wifi-change.html