The plot of HBO’s “Homeland,” in which terrorists try to hack into a world leader’s pacemaker, may not be so far-fetched, a report by CNN Health indicated. The report revealed that the U.S. Food and Drug Administration discovered 11 security vulnerabilities in operating systems that use a third-party software known as IPnet. Many medical devices use IPnet, which helps computer systems communicate with each other. If any of the IPnet flaws are exploited, the FDA warned, a hacker might be able to take control of devices such as pacemakers and infusion pumps. The hack could even infiltrate the entire hospital network.