A resposta da Netgear oficial é:
Unfortunately, there is no way to recover a lost or forgotten password from a router or access point; you will need to reset the device to factory defaults.
Se você já fez um backup da configuração do seu roteador, pode usá-lo para recuperar a senha usando o Nirsoft RouterPassView :
The backup file of the router usually contains important data like your ISP user name/password, the login password of the router, and wireless network keys. If you lost one of these password/keys, but you still have a backup file of your router configuration, RouterPassView might help you to recover your lost password from your router file.