Routers manufactured and sold by Chinese security vendor have a hard-coded password that leaves users with a wide-open backdoor that could easily be exploited by attackers to monitor the Internet traffic.

The routers are sold under the brand name Netcore in China, and Netis in other parts of the world, including South Korea, Taiwan, Israel and United States.

According to Trend Micro, the backdoor — allows cybercriminals the possibility to bypass device security and to easily run malicious code on routers and change settings.