Microsoft Internet Explorer 7.0 on Windows XP and Vista allows remote attackers to conduct phishing attacks and possibly execute arbitrary code via a res: URI to navcancl.htm with an arbitrary URL as an argument, which displays the URL in the location bar of the "Navigation Canceled" page and injects the script into the "Refresh the page" link, aka Navigation Cancel Page Spoofing Vulnerability."

Microsoft Internet Explorer 6 SP2 and earlier allows remote attackers to cause a denial of service (crash) via certain malformed HTML, possibly involving applet and base tags without required arguments, which triggers a null pointer dereference in mshtml.dll.

Microsoft Internet Explorer 6.0.2900 SP2 and earlier allows remote attackers to cause a denial of service (crash) via a table element with a CSS attribute that sets the position, which triggers an "unhandled exception" in mshtml.dll.