State Department Telecommunications: Information on Vendors and Cyber-Threat Nations, GAO-17-688R: Published: Jul 27, 2017. Publicly Released: Jul 27, 2017. “Federal telecommunications systems can include a variety of equipment, products, and services which may be produced by foreign manufacturers—and may potentially be vulnerable to manipulation by a cyber-threat nation like China, Iran, North Korea, or Russia. We examined foreign manufacturers of the State Department’s critical telecommunications equipment and services to identify those that might be closely linked to these nations. We did not identify any reported close links. We did identify some manufacturers, software developers, and contractors that had suppliers that were based in one of these nations…”