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Vulnerability details: VCID-pt1u-mqq9-myby
Vulnerability ID VCID-pt1u-mqq9-myby
Aliases CVE-2018-8371
GHSA-85j8-g29g-m326
Summary Out-of-bounds Write A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Internet Explorer, aka "Scripting Engine Memory Corruption Vulnerability." This affects Internet Explorer 9, Internet Explorer 11, Internet Explorer 10. This CVE ID is unique from CVE-2018-8353, CVE-2018-8355, CVE-2018-8359, CVE-2018-8372, CVE-2018-8373, CVE-2018-8385, CVE-2018-8389, CVE-2018-8390.
Status Published
Exploitability None
Weighted Severity None
Risk None
Affected and Fixed Packages Package Details
Weaknesses (4)
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-787 Out-of-bounds Write
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.22992 https://api.first.org/data/v1/epss?cve=CVE-2018-8371
epss 0.22992 https://api.first.org/data/v1/epss?cve=CVE-2018-8371
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-85j8-g29g-m326
cvssv3.1 7.5 https://github.com/chakra-core/ChakraCore
generic_textual HIGH https://github.com/chakra-core/ChakraCore
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2018-8371
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2018-8371
cvssv3.1 7.5 https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8371
generic_textual HIGH https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8371
cvssv3.1 7.5 https://web.archive.org/web/20210804005724/http://www.securityfocus.com/bid/105035
generic_textual HIGH https://web.archive.org/web/20210804005724/http://www.securityfocus.com/bid/105035
cvssv3.1 7.5 https://web.archive.org/web/20211205174257/http://www.securitytracker.com/id/1041483
generic_textual HIGH https://web.archive.org/web/20211205174257/http://www.securitytracker.com/id/1041483
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2018-8371
https://github.com/chakra-core/ChakraCore
https://web.archive.org/web/20210804005724/http://www.securityfocus.com/bid/105035
https://web.archive.org/web/20211205174257/http://www.securitytracker.com/id/1041483
CVE-2018-8371 https://nvd.nist.gov/vuln/detail/CVE-2018-8371
CVE-2018-8371 https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8371
GHSA-85j8-g29g-m326 https://github.com/advisories/GHSA-85j8-g29g-m326
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://github.com/chakra-core/ChakraCore
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2018-8371
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8371
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://web.archive.org/web/20210804005724/http://www.securityfocus.com/bid/105035
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://web.archive.org/web/20211205174257/http://www.securitytracker.com/id/1041483
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.96012
EPSS Score 0.22992
Published At June 4, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-02T04:42:36.120904+00:00 GitLab Importer Import https://gitlab.com/gitlab-org/advisories-community/-/blob/main/nuget/Microsoft.ChakraCore/CVE-2018-8371.yml 38.6.0