A security analyst reviews the following results of a Nikto scan: Which of the following should the security administrator investigate next?

'tiki' (likely referring to Tiki Wiki CMS Groupware) is also a web application, but without specific scan results indicating it as a finding, 'phpList' represents a generic vulnerable web application type often targeted.

Nikto is a web server scanner designed to find known vulnerabilities in web servers and web applications. 'phpList' is a popular open-source newsletter and email marketing software, which, if detected by Nikto, indicates a potential web application running on the server that should be investigated for known security flaws or misconfigurations.

'shtml.exe' is an executable associated with server-side includes and is less likely to be a direct vulnerability in the same way a full web application like phpList would be, though its presence might indicate a misconfiguration.

'sshome' is not a commonly known vulnerable web application or component typically flagged by Nikto in the same vein as content management or mailing list systems.