It's probably also because of dropbear since embedded devices often run old versions and dropbear seemed to be vulnerable to severe vulnerabilities in the past:

It's probably also because of dropbear since embedded devices often run old versions and dropbear seemed to be vulnerable to severe vulnerabilities in the past: https://www.cvedetails.com/vulnerability-list/vendor_id-15806/year-2017/Dropbear-Ssh-Project.html https://www.cvedetails.com/vulnerability-list/vendor_id-1580...