A remote code execution vulnerability exists when Internet Explorer improperly accesses objects in memory, aka "Internet Explorer Memory Corruption Vulnerability." This affects Internet Explorer 11, Internet Explorer 10. This CVE ID is unique from CVE-2018-0870, CVE-2018-0997, CVE-2018-1018, CVE-2018-1020.
http://www.securityfocus.com/bid/103614
http://www.securitytracker.com/id/1040653
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0991
Source: MITRE
Published: 2018-04-12
Updated: 2020-08-24
Type: CWE-787
Base Score: 7.6
Vector: AV:N/AC:H/Au:N/C:C/I:C/A:C
Impact Score: 10
Exploitability Score: 4.9
Severity: HIGH
Base Score: 7.5
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Impact Score: 5.9
Exploitability Score: 1.6
Severity: HIGH