A cybersecurity threat many miss.

• Position: CYBERSECURITY

As organizations tighten up their defenses against cyber attacks, there's one threat they are missing: their smaller-sized vendors.

"More and more, as the large companies put their defenses in place, the adversaries are going toward their suppliers," Sondra Barbour, Lockheed Martin's head of information systems, said at the recent Fortune Most Powerful Women Conference. Indeed, smaller vendors that can't afford expensive security measures and yet have links to some of their larger clients' sensitive data are becoming targets of...