libnx_apl.so on Nexans FTTO GigaSwitch before 6.02N and 7.x before 7.02 implements a Backdoor Account for SSH logins on port 50200 or 50201.
https://www.nexans.de/de/products/Data-Network-Solutions/Industrial-and-office-switches.html
https://sec-consult.com/vulnerability-lab/advisory/hardcoded-backdoor-user-outdated-software-components-nexans-ftto-gigaswitch/
Source: Mitre, NVD
Published: 2022-07-17
Updated: 2022-07-25
Base Score: 10
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C
Severity: Critical
Base Score: 9.8
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H