Internet Explorer 5.01 through 6.0 does not properly check certain parameters of a PNG file when opening it, which allows remote attackers to cause a denial of service (crash) by triggering a heap-based buffer overflow using invalid length codes during decompression, aka "Malformed PNG Image File Failure."

Heap-based buffer overflow in the Remote Data Services (RDS) component of Microsoft Data Access Components (MDAC) 2.1 through 2.6, and Internet Explorer 5.01 through 6.0, allows remote attackers to execute code via a malformed HTTP request to the Data Stub.

Cross-Frame scripting vulnerability in the WebBrowser control as used in Internet Explorer 5.5 and 6.0 allows remote attackers to execute arbitrary code, read arbitrary files, or conduct other unauthorized activities via script that accesses the Document property, which bypasses <frame> and <iframe> domain restrictions.

The legacy <script> data-island capability for XML in Microsoft Internet Explorer 5.01, 5.5, and 6.0 allows remote attackers to read arbitrary XML files, and portions of other files, via a URL whose "src" attribute redirects to a local file.

Buffer overflow in a legacy ActiveX control used to display specially formatted text in Microsoft Internet Explorer 5.01, 5.5, and 6.0 allows remote attackers to execute arbitrary code, aka "Buffer Overrun in Legacy Text Formatting ActiveX Control".

The Web Folder component for Internet Explorer 5.5 and 6.0 writes an error message to a known location in the temporary folder, which allows remote attackers to execute arbitrary code by injecting it into the error message, then referring to the error message file via a mhtml: URL.

Microsoft Internet Explorer 5.01 and 5.5 allows remote attackers to execute scripts in the Local Computer zone via a URL that references a local HTML resource file, a variant of "Cross-Site Scripting in Local HTML Resource" as identified by CAN-2002-0189.

Microsoft Internet Explorer 5.5 and 6.0 does not properly verify the domain of a frame within a browser window, which allows remote attackers to read client files or invoke executable objects via the Object tag, aka "Cross Domain Verification in Object Tag."

Internet Explorer 4.0 and later allows remote attackers to read arbitrary files via a web page that accesses a legacy XML Datasource applet (com.ms.xml.dso.XMLDSO.class) and modifies the base URL to point to the local system, which is trusted by the applet.

Microsoft Internet Explorer 5.01, 5.5, and 6.0 allows remote attackers to misrepresent the source of a file in the File Download dialogue box to trick users into thinking that the file type is safe to download, aka "File Origin Spoofing."