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Vulnerability details: VCID-1ztz-et4b-ykac
Vulnerability ID VCID-1ztz-et4b-ykac
Aliases CVE-2021-21156
Summary Heap buffer overflow in V8 in Google Chrome prior to 88.0.4324.182 allowed a remote attacker to potentially exploit heap corruption via a crafted script.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-787 Out-of-bounds Write
System Score Found at
epss 0.01277 https://api.first.org/data/v1/epss?cve=CVE-2021-21156
epss 0.01277 https://api.first.org/data/v1/epss?cve=CVE-2021-21156
epss 0.01277 https://api.first.org/data/v1/epss?cve=CVE-2021-21156
epss 0.01277 https://api.first.org/data/v1/epss?cve=CVE-2021-21156
epss 0.01604 https://api.first.org/data/v1/epss?cve=CVE-2021-21156
epss 0.01604 https://api.first.org/data/v1/epss?cve=CVE-2021-21156
epss 0.01604 https://api.first.org/data/v1/epss?cve=CVE-2021-21156
epss 0.01604 https://api.first.org/data/v1/epss?cve=CVE-2021-21156
epss 0.01604 https://api.first.org/data/v1/epss?cve=CVE-2021-21156
epss 0.01604 https://api.first.org/data/v1/epss?cve=CVE-2021-21156
epss 0.01604 https://api.first.org/data/v1/epss?cve=CVE-2021-21156
epss 0.01604 https://api.first.org/data/v1/epss?cve=CVE-2021-21156
epss 0.01604 https://api.first.org/data/v1/epss?cve=CVE-2021-21156
epss 0.01604 https://api.first.org/data/v1/epss?cve=CVE-2021-21156
epss 0.01604 https://api.first.org/data/v1/epss?cve=CVE-2021-21156
epss 0.01604 https://api.first.org/data/v1/epss?cve=CVE-2021-21156
epss 0.01604 https://api.first.org/data/v1/epss?cve=CVE-2021-21156
epss 0.01604 https://api.first.org/data/v1/epss?cve=CVE-2021-21156
epss 0.01604 https://api.first.org/data/v1/epss?cve=CVE-2021-21156
epss 0.01604 https://api.first.org/data/v1/epss?cve=CVE-2021-21156
epss 0.01604 https://api.first.org/data/v1/epss?cve=CVE-2021-21156
epss 0.01604 https://api.first.org/data/v1/epss?cve=CVE-2021-21156
epss 0.01604 https://api.first.org/data/v1/epss?cve=CVE-2021-21156
epss 0.01604 https://api.first.org/data/v1/epss?cve=CVE-2021-21156
epss 0.01604 https://api.first.org/data/v1/epss?cve=CVE-2021-21156
cvssv2 6.8 https://nvd.nist.gov/vuln/detail/CVE-2021-21156
cvssv3.1 8.8 https://nvd.nist.gov/vuln/detail/CVE-2021-21156
archlinux High https://security.archlinux.org/AVG-1584
archlinux High https://security.archlinux.org/AVG-1585
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2021-21156
https://chromereleases.googleblog.com/2021/02/stable-channel-update-for-desktop_16.html
https://crbug.com/1177341
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21148
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21149
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21150
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21151
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21152
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21153
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21154
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21155
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21156
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21157
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BI6ZIJQYP5DFMYVX4J5OGOU2NQLEZ3SB/
AVG-1584 https://security.archlinux.org/AVG-1584
AVG-1585 https://security.archlinux.org/AVG-1585
cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
CVE-2021-21156 https://nvd.nist.gov/vuln/detail/CVE-2021-21156
No exploits are available.
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2021-21156
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-21156
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 0.78808
EPSS Score 0.01277
Published At Aug. 1, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T10:15:58.518784+00:00 NVD Importer Import https://nvd.nist.gov/vuln/detail/CVE-2021-21156 37.0.0