In early June, Reuters disclosed that the US Federal Reserve had detected more that 50 cyber security breaches from 2011 through 2015. It should be noted that this may only represent a small fraction of the Fed’s total exposure during this period.
It turns out that, unlike the Washington-based Board of Governors, the 12 privately owned regional branches of the Fed are not subject to the Freedom of Information Act (FOIA) request, so their breaches went unreported.