Microsoft Internet Explorer 7 allows remote attackers to (1) cause a security certificate from a secure web site to appear invalid via a link to res://ieframe.dll/sslnavcancel.htm with the target site in the anchor identifier, which displays the site's URL in the address bar but causes Internet Explorer to report that the certificate is invalid, or (2) trigger a "The webpage no longer exists" report via a link to res://ieframe.dll/http_410.htm, a variant of CVE-2006-5805.