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Vulnerability details: VCID-fy4b-bjke-7uf5
Vulnerability ID VCID-fy4b-bjke-7uf5
Aliases CVE-2020-0830
GHSA-g644-6fg4-hrh9
Summary Improper Restriction of Operations within the Bounds of a Memory Buffer A remote code execution vulnerability exists in the way the scripting engine handles objects in memory in Microsoft browsers.
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-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-787 Out-of-bounds Write
System Score Found at
epss 0.08249 https://api.first.org/data/v1/epss?cve=CVE-2020-0830
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2020-0830
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2020-0830
cvssv3.1 7.5 https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0830
generic_textual HIGH https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0830
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2020-0830
CVE-2020-0830 https://nvd.nist.gov/vuln/detail/CVE-2020-0830
CVE-2020-0830 https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0830
No exploits are available.
Vector: CVSS:3.1/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-2020-0830
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:3.1/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-2020-0830
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 0.92372
EPSS Score 0.08249
Published At June 4, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-04T16:19:51.931750+00:00 GitLab Importer Import https://gitlab.com/gitlab-org/advisories-community/-/blob/main/nuget/Microsoft.ChakraCore/CVE-2020-0830.yml 38.6.0