US Navy recently confirmed that sensitive information of over 130,000 of its officials has been accessed by hackers, who managed to penetrate the laptop of a certain contractor.

The hackers hacked a laptop that belonged to a worker at the Hewlett Packard Enterprise Services. The Naval Criminal Investigative Service found out that the hackers got their hands on social security numbers and other sensitive information from 134,386 sailors, both current and former, Tech Times reported.

The personal data that were stolen came from C-Way, or Career Waypoints, which is where re-enlistment and Navy Occupational Speciality are submitted.

The Naval Criminal Investigative Service said that there is no malicious use of the sensitive information yet, Navy Times reported.

Navy's Actions on the Issue

Navy personnel boss Vice Adm. Robert Burke said that they take this matter extremely seriously since it involves the trust of their sailors. He said they are not in the early stage of investigation to identify the perpetrators as quick as possible.

Moreover, they are now working on taking care of the affected data, according to Burke. The Navy will notify the sailors whose data were stolen in the weeks to come.

Breaches in the Past

Navy data has been cracked in the past, besides this latest incident. According to the HPES, Iranian hackers got their hands on unclassified data of Navy and Marine Corps personnel back in 2013.

The U.S. Office of Personnel Management also revealed that it was also attacked by hackers in June 2015. This affected the data of millions of people, which includes federal workers. Some 21 million people fell victim to this hack, which is considered as the biggest hack reported in 2015.

The OPM said they are working with the Department of Homeland Security and the FBI to investigate these breaches and make sure that attacks like these will never happen again.