Security researchers have uncovered a security breach that exposes the data of more than half of United States households. 

Experts working with a firm named vpnMentor, that expertises in analyzing virtual private network services, discovered a database containing details of about 80 million American households. 

The database was hosted on a Microsoft cloud server, that includes some sensitive information like names, addresses, locations, gender, age, income, home type and marital status, among other data. 

However, social security numbers and credit card details were not enlisted there. 

Researchers Ran Locar and Noam Rotem said it's unclear who owns the 24-gigabyte database.  

'Unlike previous leaks we've discovered, this time, we have no idea who this database belongs to,' the researchers said. 

'It's hosted on a cloud server, which means the IP address associated with it is not necessarily connected to its owner.'  

Meanwhile, the database is still available online, and is not protected by password. 

'This isn’t the first time a huge database has been breached,' the researchers explained. 

'However, we believe that it is the first time a breach of this size has included peoples' names, addresses, and income. 

'This open database is a goldmine for identity thieves and other attackers,' they added.