The water treatment plant in a Florida city, that was breached last week and had its sodium hydroxide levels changed temporarily before they were reversed back to normal, was running an outdated version of Windows and the password for its TeamViewer application was shared among all employees, according to an advisory from the Massachusetts state government.
A malicious attacker was able to gain access to the water treatment plant in Oldsmar, a city in Pinellas County, Florida, and increased the concentration of sodium hydroxide to what the county sheriff Bob Gualtieri described as a "dangerous level".