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Vulnerability details: VCID-s9e8-hvkt-tyfc
Vulnerability ID VCID-s9e8-hvkt-tyfc
Aliases CVE-2018-0834
GHSA-5j48-826p-2w9r
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-2018-0835, CVE-2018-0836, CVE-2018-0837, CVE-2018-0838, CVE-2018-0840, CVE-2018-0856, CVE-2018-0857, 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 0.78098 https://api.first.org/data/v1/epss?cve=CVE-2018-0834
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-5j48-826p-2w9r
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/6cd503299eac4a5b5ffc0c5bb0d072861f60e183
generic_textual HIGH https://github.com/chakra-core/ChakraCore/commit/6cd503299eac4a5b5ffc0c5bb0d072861f60e183
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2018-0834
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2018-0834
cvssv3.1 7.5 https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0834
generic_textual HIGH https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0834
cvssv3.1 7.5 https://web.archive.org/web/20210124135628/http://www.securityfocus.com/bid/102859
generic_textual HIGH https://web.archive.org/web/20210124135628/http://www.securityfocus.com/bid/102859
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
cvssv3.1 7.5 https://www.exploit-db.com/exploits/44078
generic_textual HIGH https://www.exploit-db.com/exploits/44078
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2018-0834
https://github.com/chakra-core/ChakraCore
https://github.com/chakra-core/ChakraCore/commit/6cd503299eac4a5b5ffc0c5bb0d072861f60e183
https://web.archive.org/web/20210124135628/http://www.securityfocus.com/bid/102859
https://web.archive.org/web/20211208072939/http://www.securitytracker.com/id/1040372
https://www.exploit-db.com/exploits/44078
https://www.exploit-db.com/exploits/44078/
http://www.securityfocus.com/bid/102859
http://www.securitytracker.com/id/1040372
CVE-2018-0834 Exploit https://bugs.chromium.org/p/project-zero/issues/detail?id=1455&desc=2
CVE-2018-0834 Exploit https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/windows/dos/44078.js
CVE-2018-0834 https://nvd.nist.gov/vuln/detail/CVE-2018-0834
CVE-2018-0834 https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0834
GHSA-5j48-826p-2w9r https://github.com/advisories/GHSA-5j48-826p-2w9r
Data source Exploit-DB
Date added Feb. 15, 2018
Description Microsoft Edge Chakra JIT - Array Type Confusion via InitProto Instructions
Ransomware campaign use Known
Source publication date Feb. 15, 2018
Exploit type dos
Platform windows
Source update date Feb. 15, 2018
Source URL https://bugs.chromium.org/p/project-zero/issues/detail?id=1455&desc=2
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/6cd503299eac4a5b5ffc0c5bb0d072861f60e183
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-2018-0834
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-2018-0834
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/20210124135628/http://www.securityfocus.com/bid/102859
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
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://www.exploit-db.com/exploits/44078
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 0.99038
EPSS Score 0.78098
Published At May 30, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-05-30T20:53:25.668052+00:00 GitLab Importer Import https://gitlab.com/gitlab-org/advisories-community/-/blob/main/nuget/Microsoft.ChakraCore/CVE-2018-0834.yml 38.6.0