According to Reuters, hackers who breached NASDAQ systems last year were able to install software that allowed them to spy on corporate directors' actions.

"The news adds critical details to the story of an October, 2010, compromise of Director's Desk, a Web-based application that is used by the boards of NASDAQ-traded companies to share documents and communicate with company executives," writes Threatpost's Paul Roberts.

"The hackers were able to access confidential documents and the communications of board directors, according to the report, which quotes Tom Kellermann, chief technology officer at security technology firm AirPatrol Corp," Roberts writes.

Go to "Report: NASDAQ Hackers Spied on Corporate Directors" to read the details.

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