Sonos has released a software update for their Sonos Wireless HiFi System. The company said that this is a security update and is highly recommended for all owners.
Sonos added in a statement:
This update fixes a bug that, in rare cases, could allow someone to access the usernames and passwords of services used on your Sonos. Currently, we are not aware of any customer data being compromised. If you have any evidence that your account credentials were inappropriately accessed please contact Sonos customer service at http://www.sonos.com/support.
The company is also advising to use different passwords for different online accounts. This is of course a basic practice which is hard to follow in real world but can save major hassles.