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TechRadar
TechRadar
Sead Fadilpašić

Another top router maker accused of firmware having backdoors — Chinese giant Zbtlink halts downloads to fix issue

Someone cutting a network cable linked to a router.
  • VulnCheck CTO Jacob Baines reported Zbtlink routers shipped with a built‑in backdoor dubbed ENDLESSDOORS , allowing remote root commands and reverse shells
  • Zbtlink denied malicious intent, calling it an after‑sales maintenance feature, but quietly pulled vulnerable firmware and promised patches
  • Researchers warn all firmware images are hijackable; mitigation advice is to replace devices or enforce strict egress controls and treat LAN as untrusted

Chinese networking firm Zbtlink has been accused of shipping its products with a backdoor - and while the company denies the allegations, it has still apparently moved to address the issue.

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