Following reports that Steam had suffered a security breach that might affect as many as 89 million users, Valve has set the record straight on the matter, clarifying that the leak absolutely did not breach Steam systems, and users do not need to change their passwords.
We have examined the leak sample and have determined this was NOT a breach of Steam systems. We’re still digging into the source of the leak, which is compounded by the fact that any SMS messages are unencrypted in transit, and routed through multiple providers on the way to your phone.
The leak consisted of older text messages that included one-time codes that were only valid for 15-minute time frames and the phone numbers they were sent to. The leaked data did not associate the phone numbers with a Steam account, password information, payment information or other personal data. Old text messages cannot be used to breach the security of your Steam account, and whenever a code is used to change your Steam email or password using SMS, you will receive a confirmation via email and/or Steam secure messages.
You do not need to change your passwords or phone numbers as a result of this event. It is a good reminder to treat any account security messages that you have not explicitly requested as suspicious. We recommend regularly checking your Steam account security at any time at this URL.
We also recommend setting up the Steam Mobile Authenticator if you haven’t already, as it gives us the best way to send secure messages about your account and your account’s safety.
The reports began when a hacker known as Machine1337 or EnergyWeapon started advertising the sale of user records for Valve’s platforms on the dark web. They were attempting to sell the data for $5K, but according to Valve, nothing malicious could be done with them anyway.
