The credentials required to access the device's web server are sent in base64 within the HTTP headers. Since base64 is not considered a strong cipher, an attacker could intercept the web request handling the login and obtain the credentials.
Exploitability
AV:AAC:LAT:NPR:NUI:AVulnerable System
VC:HVI:NVA:NSubsequent System
SC:LSI:NSA:N6.8/CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:L/SI:N/SA:NOther