Microsoft Internet Explorer 6.0.2900.2180 and earlier allows remote attackers to cause a denial of service (CPU and memory consumption) via a long Unicode string argument to the write method, a related issue to CVE-2009-2479. NOTE: it was later reported that 7.0.6000.16473 and earlier are also affected.
Microsoft Internet Explorer 4.0 through 7 allows remote attackers to determine the existence of local files that have associated images via a res:// URI in the src property of a JavaScript Image object, as demonstrated by the URI for a bitmap image resource within a (1) .exe or (2) .dll file.
Microsoft Virtual Machine (VM) in Internet Explorer 4.x and 5.x allows an unsigned applet to create and use ActiveX controls, which allows a remote attacker to bypass Internet Explorer's security settings and execute arbitrary commands via a malicious web page or email, aka the "Microsoft VM ActiveX Component" vulnerability.
The Microsoft Active Setup ActiveX component in Internet Explorer 4.x and 5.x allows a remote attacker to install software components without prompting the user by stating that the software's manufacturer is Microsoft.