ENDLESSDOORS Is Phoning Home. Pick Up.

Reported 05 Aug 2026 by otx · Severity: medium

Zbtlink routers, manufactured by Shenzhen Zhibotong Electronics and sold globally under multiple brand names including Wiflyer, contain a pre-installed backdoor implant named ENDLESSDOORS. This implant, based on the open-source rctl tool, runs as disguised userland processes name