News is emerging that yet another online network may have been hacked, and this time, from a service that acts as a safe-deposit box for users other passwords.

Cloud-based password management company LastPass issued a warning to users late Wednesday advising customers to change their passwords as a precaution to what may be a massive data-breach.

We're going to be paranoid and assume the worst: that the data we stored in the database was somehow accessed, Joe Siegrist, LastPass CEO said.

We know roughly the amount of data transferred and that it's big enough to have transferred people's email addresses, the server salt and their salted password hashes from the database.

LastPass is one of the largest cloud-based password management tools on the web. The company serves clients in 113 countries.

It said experts are delving deeper into the breach and will release more details as they emerge.

If the hack is proven, it represents the latest in a series of high-profile data-losses in the past few weeks.

Just last month Sony admitted that its only gaming network, the Playstation Network, was hacked, potentially exposing data of nearly 80 million users. The breach, one of the largest in history, also leaked 10 million credit cards, though the company said those were encrypted.

Also today, for the second month in a row, Best Buy has had to inform customers that their e-mail addresses were stolen.

On April 22, the consumer electronics retailer discovered some e-mail addresses had been exposed in a security breach at a third-party vendor.