House Oversight Committee Chairman Jason Chaffetz revealed new details on a second data breach that impacts 21.5 million people. The second incident began in May of 2014 and went undiscovered for a year. OPM became aware of the second breach while investigating the first one disclosed in June. The first breach exposed Social Security Numbers and biometric data for federal employees and in some cases their families. The agency has also had to deal with legal issues stemming from the breach, as a federal employees union filed a lawsuit alleging their negligence.”]
Source: https://www.csoonline.com/article/2946454/opm-says-second-breach-compromised-21-million-records.html