The vulnerability was spotted in the wild by Trend Micro researcher on July 11, 2018. The exploit sample detected by the researchers was using the same obfuscation technique as exploits for CVE-2018-8174, spotted in the wild by Qihoo 360 in April 2018.
Vulnerable component: Microsoft Internet Explorer
CVSSv3 score: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C
CWE-ID: CWE-416 - Use After Free
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a use-after-free error in VBScript when the scripting engine handles objects in memory in Internet Explorer. A remote unauthenticated attacker can trick the victim into visiting a specially crafted website, trigger memory corruption and execute arbitrary code with elevated privileges.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Note: The vulnerability has been exploited in the wild.