The Microsoft virtual machine (VM) in Internet Explorer 4.x and 5.x allows a remote attacker to read files via a malicious Java applet that escapes the Java sandbox, aka the "VM File Reading" vulnerability.
From 神龙GPT (AIGC)
Microsoft的虚拟虚拟机(VM)在Internet Explorer 4.x和5.x中允许远程攻击者通过一个绕过Java虚拟机安全 sandbox的恶意Java小程序来读取文件，即“VM文件读取”漏洞。