CVE-2023-39808: Nvki Intelligent Broadband Subscriber Gateway

Critical severity, CVSS 9.8. EPSS: 0.6% chance of exploitation in the next 30 days.

N.V.K.INTER CO., LTD. (NVK) iBSG v3.5 was discovered to contain a hardcoded root password that allows attackers to login with root privileges via the SSH service. The cleartext password corresponding to the $1$4Tmm01jl$7HRvcW.bz7uGmX9hiQWvR hash was not determined by the vulnerability discoverer.

Affected products

• Nvki Intelligent Broadband Subscriber Gateway: version 3.5 only

Published 2023-08-21. Last modified 2026-07-09.