Northrop Grumman, the American aerospace and defense technology company, has suffered a data breach.

According to a letter sent out earlier this week to the Attorney General of Vermont, a company database containing the personal information of individuals who have applied or have been retained as linguists for the company’s Balkans Linguist Support Program has been accessed by hackers.

The breach occurred sometime between late November 2012 and May 2013. However, as DataBreaches highlights, it’s uncertain if the attackers had access to Northrop Grumman’s systems all this time or if the company’s systems were breached only once during this timeframe.

The affected database, which has been taken offline, contained names, dates of birth, blood types, social security numbers, contact information, and other government-issued identification numbers.

Northrop Grumman says there’s no evidence to suggest that the compromised information has been misused. However, they’re offering impacted individuals free identity protection services with AllClear ID.

Six of the affected people are New Hampshire residents.