What is the role of the HTTP Server API in achieving port reuse for command execution on a Windows server with low privileges?

The HTTP Server API allows applications to register URL endpoints on the same port via `HttpAddUrl()`. An attacker can leverage existing URL ACLs like `http://+:80/Temporary_Listen_Addresses/` which grant `Everyone` listen permission by default, enabling a custom executable running with standard user privileges to receive HTTP requests. The attacker can then modify the sample code to execute commands sent via GET requests and return results, effectively achieving remote command execution without administrator privileges. This technique is covered in Bypassing firewalls using IIS module functionality as another example of reuse.