Multiple serious vulnerabilities have been found in Microsoft ChakraCore. Malicious users can exploit these vulnerabilities to execute arbitrary code, bypass security restrictions and obtain sensitive information. Below is a complete list of vulnerabilities:

1. An improper handling of objects in memory in Microsoft Edge can be exploited remotely via a specially crafted website to obtain sensitive information;
2. Memory corruption vulnerability in Microsoft browsers can be exploited remotely via a specially designed website to execute arbitrary code;
3. An unspecified vulnerability in Control Flow Guard (CFG) component of Microsoft ChakraCore can be exploited remotely via a specially designed website to bypass security restrictions and possibly to execute arbitrary code.

ChakraCore

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

The following public exploits exists for this vulnerability:

https://www.exploit-db.com/exploits/43491

https://www.exploit-db.com/exploits/43522

https://www.exploit-db.com/exploits/43710

https://www.exploit-db.com/exploits/44075

https://www.exploit-db.com/exploits/43715

https://www.exploit-db.com/exploits/43717

https://www.exploit-db.com/exploits/43723

https://www.exploit-db.com/exploits/43718

https://www.exploit-db.com/exploits/43720

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