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Vulnerability details: VCID-vaa5-jutt-1ydh
Vulnerability ID VCID-vaa5-jutt-1ydh
Aliases CVE-2018-0993
GHSA-7c7v-g484-j4cf
Summary Out-of-bounds Write A remote code execution vulnerability exists in the way that the Chakra scripting engine handles objects in memory in Microsoft Edge, aka "Chakra Scripting Engine Memory Corruption Vulnerability." This affects Microsoft Edge, ChakraCore. This CVE ID is unique from CVE-2018-0979, CVE-2018-0980, CVE-2018-0990, CVE-2018-0994, CVE-2018-0995, CVE-2018-1019.
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 0.22672 https://api.first.org/data/v1/epss?cve=CVE-2018-0993
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-7c7v-g484-j4cf
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/4bdd0efb1c309a0307cdfbd2856ca8cd88b154bb
generic_textual HIGH https://github.com/chakra-core/ChakraCore/commit/4bdd0efb1c309a0307cdfbd2856ca8cd88b154bb
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2018-0993
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2018-0993
cvssv3.1 7.5 https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0993
generic_textual HIGH https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0993
cvssv3.1 7.5 https://web.archive.org/web/20210125210148/http://www.securityfocus.com/bid/103627
generic_textual HIGH https://web.archive.org/web/20210125210148/http://www.securityfocus.com/bid/103627
cvssv3.1 7.5 https://web.archive.org/web/20211207123630/http://www.securitytracker.com/id/1040650
generic_textual HIGH https://web.archive.org/web/20211207123630/http://www.securitytracker.com/id/1040650
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2018-0993
https://github.com/chakra-core/ChakraCore
https://github.com/chakra-core/ChakraCore/commit/4bdd0efb1c309a0307cdfbd2856ca8cd88b154bb
https://web.archive.org/web/20210125210148/http://www.securityfocus.com/bid/103627
https://web.archive.org/web/20211207123630/http://www.securitytracker.com/id/1040650
CVE-2018-0993 https://nvd.nist.gov/vuln/detail/CVE-2018-0993
CVE-2018-0993 https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0993
GHSA-7c7v-g484-j4cf https://github.com/advisories/GHSA-7c7v-g484-j4cf
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/4bdd0efb1c309a0307cdfbd2856ca8cd88b154bb
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-2018-0993
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-2018-0993
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/20210125210148/http://www.securityfocus.com/bid/103627
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/20211207123630/http://www.securitytracker.com/id/1040650
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 0.95959
EPSS Score 0.22672
Published At May 30, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-05-30T20:58:25.935562+00:00 GitLab Importer Import https://gitlab.com/gitlab-org/advisories-community/-/blob/main/nuget/Microsoft.ChakraCore/CVE-2018-0993.yml 38.6.0