A user with vpuser credentials that opens an SSH connection to the device, gets a restricted shell rbash that allows only a small list of allowed commands. This vulnerability enables the user to get a full-featured Linux shell, bypassing the rbash restrictions.
Exploitability
AV:NAC:LPR:HUI:NScope
S:CImpact
C:LI:NA:N4.1/CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:NOther