The WebBrowser ActiveX control, or the Internet Explorer HTML rendering engine (MSHTML), as used in Internet Explorer 6, allows remote attackers to execute arbitrary code in the Local Security context by using the showModalDialog method and modifying the location to execute code such as Javascript, as demonstrated using (1) delayed HTTP redirect operations, and an HTTP response with a Location: header containing a "URL:" prepended to a "ms-its" protocol URI, or (2) modifying the location attribute of the window, as exploited by the Download.ject (aka Scob aka Toofer) using the ADODB.Stream object.

Cross-site scripting vulnerability in Internet Explorer 6 earlier allows remote attackers to execute arbitrary script via an Extended HTML Form, whose output from the remote server is not properly cleansed.

Internet Explorer 5.5 and earlier allows remote attackers to obtain the physical location of cached content and open the content in the Local Computer Zone, then use compiled HTML help (.chm) files to execute arbitrary programs.

Internet Explorer 5.5 and earlier does not properly verify the domain of a frame within a browser window, which allows remote web site operators to read certain files on the client by sending information from a local frame to a frame in a different domain, aka a variant of the "Frame Domain Verification" vulnerability.

Internet Explorer 5.5 and earlier does not properly validate digital certificates when Certificate Revocation List (CRL) checking is enabled, which could allow remote attackers to spoof trusted web sites, aka the "Server certificate validation vulnerability."

Internet Explorer 5.5 and earlier allows remote attackers to display a URL in the address bar that is different than the URL that is actually being displayed, which could be used in web site spoofing attacks, aka the "Web page spoofing vulnerability."

Windows Scripting Host in Internet Explorer 5.5 and earlier allows remote attackers to read arbitrary files via the GetObject Javascript function and the htmlfile ActiveX object.

Internet Explorer 5.5 and earlier executes Telnet sessions using command line arguments that are specified by the web site, which could allow remote attackers to execute arbitrary commands if the IE client is using the Telnet client provided in Services for Unix (SFU) 2.0, which creates session transcripts.

HTML e-mail feature in Internet Explorer 5.5 and earlier allows attackers to execute attachments by setting an unusual MIME type for the attachment, which Internet Explorer does not process correctly.

Internet Explorer 5.0 through 5.5 allows remote attackers to read arbitrary files from the client via the INPUT TYPE element in an HTML form, aka the "File Upload via Form" vulnerability.

Internet Explorer 5.01 and earlier allows a remote attacker to create a reference to a client window and use a server-side redirect to access local files via that window, aka "Server-side Page Reference Redirect."