# VulnCheck Finds Backdoor in More Than 20 Zbtlink Router Models 2026-08-06T11:45:30+00:00 | Technology | Indian Opinion Desk Corroboration: 2 independent outlets Cybersecurity firm VulnCheck has found a previously unreported backdoor, named Endlessdoors, in more than 20 Zbtlink router models sold worldwide under the Zbtlink and Wiflyer brands. The routers reportedly contact a specific IP address and a China-registered domain every 35 seconds. Whoever controls those domains could access the router and potentially other devices on its network. VulnCheck estimates at least 100,000 such routers are deployed globally, though their locations and active numbers are unknown. Zbtlink did not respond to requests for comment. Reuters reports that researchers could not establish the backdoor’s purpose or whether it has been exploited. Beijing denies supporting cyberattacks. ## Coverage - hindustantimes.com - timesnownews.com Tags: backdoor, China, cybersecurity, routers, Zbtlink Canonical: https://indianopinion.org/researchers-warn-of-backdoor-in-zbtlink-and-wiflyer-routers/ License: Summary and commentary (c) Indian Opinion, reusable with attribution. Facts belong to the linked sources. Cite: https://indianopinion.org/researchers-warn-of-backdoor-in-zbtlink-and-wiflyer-routers/#story-in-brief Review state: restored archive article, accurate at time of publication, not offered to search indexes.