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Vulnerability details: VCID-8ewe-v59k-4kfj
Vulnerability ID VCID-8ewe-v59k-4kfj
Aliases CVE-2018-0857
GHSA-q9x6-7hjh-q9fc
Summary Out-of-bounds Write Microsoft Edge and ChakraCore in Microsoft Windows Gold, and Windows Server allows remote code execution, due to how the scripting engine handles objects in memory, aka "Scripting Engine Memory Corruption Vulnerability". This CVE ID is unique from CVE-2018-0834, CVE-2018-0835, CVE-2018-0836, CVE-2018-0837, CVE-2018-0838, CVE-2018-0840, CVE-2018-0856, CVE-2018-0858, CVE-2018-0859, CVE-2018-0860, CVE-2018-0861, and CVE-2018-0866.
Status Published
Exploitability None
Weighted Severity None
Risk None
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-787 Out-of-bounds Write
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.284 https://api.first.org/data/v1/epss?cve=CVE-2018-0857
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-q9x6-7hjh-q9fc
cvssv3.1 7.5 https://github.com/chakra-core/ChakraCore
generic_textual HIGH https://github.com/chakra-core/ChakraCore
cvssv3.1 7.5 https://github.com/chakra-core/ChakraCore/commit/6f4265c3db2aad323bce617324190d021c11126f
generic_textual HIGH https://github.com/chakra-core/ChakraCore/commit/6f4265c3db2aad323bce617324190d021c11126f
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2018-0857
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2018-0857
cvssv3.1 7.5 https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0857
generic_textual HIGH https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0857
cvssv3.1 7.5 https://web.archive.org/web/20210124135818/http://www.securityfocus.com/bid/102881
generic_textual HIGH https://web.archive.org/web/20210124135818/http://www.securityfocus.com/bid/102881
cvssv3.1 7.5 https://web.archive.org/web/20211208072939/http://www.securitytracker.com/id/1040372
generic_textual HIGH https://web.archive.org/web/20211208072939/http://www.securitytracker.com/id/1040372
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2018-0857
https://github.com/chakra-core/ChakraCore
https://github.com/chakra-core/ChakraCore/commit/6f4265c3db2aad323bce617324190d021c11126f
https://web.archive.org/web/20210124135818/http://www.securityfocus.com/bid/102881
https://web.archive.org/web/20211208072939/http://www.securitytracker.com/id/1040372
http://www.securityfocus.com/bid/102881
http://www.securitytracker.com/id/1040372
CVE-2018-0857 https://nvd.nist.gov/vuln/detail/CVE-2018-0857
CVE-2018-0857 https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0857
GHSA-q9x6-7hjh-q9fc https://github.com/advisories/GHSA-q9x6-7hjh-q9fc
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://github.com/chakra-core/ChakraCore/commit/6f4265c3db2aad323bce617324190d021c11126f
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-2018-0857
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-2018-0857
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/20210124135818/http://www.securityfocus.com/bid/102881
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/20211208072939/http://www.securitytracker.com/id/1040372
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 0.96593
EPSS Score 0.284
Published At May 30, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-05-30T20:53:25.524783+00:00 GitLab Importer Import https://gitlab.com/gitlab-org/advisories-community/-/blob/main/nuget/Microsoft.ChakraCore/CVE-2018-0857.yml 38.6.0