Multiple serious vulnerabilities have been found in Microsoft Internet Explorer. Malicious users can exploit these vulnerabilities to bypass security restrictions, gain privileges, execute arbitrary code or obtain sensitive information.

Below is a complete list of vulnerabilities

1. Improper memory objects access can be exploited remotely via a specially designed web site to execute arbitrary code;
2. Improper memory objects handling at script engines can be exploited remotely via a specially designed web site to execute arbitrary code;
3. Improper permissions validation can be exploited remotely via a specially designed web site to gain privileges;
4. Improper memory disclosure can be exploited remotely to obtaib sensitive information;
5. Lack of ASLR restrictions at script engines can be exploited remotely to obtain sensitive information;
6. Improper memory content disclosure at script engine can be exploited remotely via a specially designed web site to obtain sensitive information.

Microsoft Internet Explorer versions from 7 through 11

Install necessary updates from the KB section, that are listed in your Windows Update (Windows Update usually can be accessed from the Control Panel)

CVE-2015-2482
CVE-2015-6055
CVE-2015-6059
CVE-2015-6052
CVE-2015-6044
CVE-2015-6047
CVE-2015-6056
CVE-2015-6053
CVE-2015-6050
CVE-2015-6051
CVE-2015-6048
CVE-2015-6049
CVE-2015-6046
CVE-2015-6042

3097617
3094995
3094996
3093983
3096441

The following public exploits exists for this vulnerability:

https://www.exploit-db.com/exploits/40798

Malware exists for this vulnerability. Usually such malware is classified as Exploit. More details.