Search for vulnerabilities
Vulnerability details: VCID-cyhg-rbtr-xybx
Vulnerability ID VCID-cyhg-rbtr-xybx
Aliases CVE-2021-30551
Summary Type confusion in V8 in Google Chrome prior to 91.0.4472.101 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
Status Published
Exploitability 2.0
Weighted Severity 9.0
Risk 10.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-843 Access of Resource Using Incompatible Type ('Type Confusion')
System Score Found at
epss 0.67595 https://api.first.org/data/v1/epss?cve=CVE-2021-30551
epss 0.76294 https://api.first.org/data/v1/epss?cve=CVE-2021-30551
epss 0.76294 https://api.first.org/data/v1/epss?cve=CVE-2021-30551
epss 0.76294 https://api.first.org/data/v1/epss?cve=CVE-2021-30551
epss 0.76294 https://api.first.org/data/v1/epss?cve=CVE-2021-30551
epss 0.76294 https://api.first.org/data/v1/epss?cve=CVE-2021-30551
epss 0.76294 https://api.first.org/data/v1/epss?cve=CVE-2021-30551
epss 0.76294 https://api.first.org/data/v1/epss?cve=CVE-2021-30551
epss 0.76294 https://api.first.org/data/v1/epss?cve=CVE-2021-30551
cvssv3.1 8.8 https://chromereleases.googleblog.com/2021/06/stable-channel-update-for-desktop.html
ssvc Attend https://chromereleases.googleblog.com/2021/06/stable-channel-update-for-desktop.html
cvssv3.1 8.8 https://crbug.com/1216437
ssvc Attend https://crbug.com/1216437
cvssv3.1 8.8 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv3.1 8.8 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ETMZL6IHCTCTREEL434BQ4THQ7EOHJ43/
ssvc Attend https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ETMZL6IHCTCTREEL434BQ4THQ7EOHJ43/
cvssv3.1 8.8 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PAT6EOXVQFE6JFMFQF4IKAOUQSHMHL54/
ssvc Attend https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PAT6EOXVQFE6JFMFQF4IKAOUQSHMHL54/
cvssv2 6.8 https://nvd.nist.gov/vuln/detail/CVE-2021-30551
cvssv3.1 8.8 https://nvd.nist.gov/vuln/detail/CVE-2021-30551
archlinux Critical https://security.archlinux.org/AVG-2057
archlinux Critical https://security.archlinux.org/AVG-2058
cvssv3.1 8.8 https://security.gentoo.org/glsa/202107-06
ssvc Attend https://security.gentoo.org/glsa/202107-06
cvssv3.1 8.8 https://security.gentoo.org/glsa/202208-25
ssvc Attend https://security.gentoo.org/glsa/202208-25
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2021-30551
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30551
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
1216437 https://crbug.com/1216437
202107-06 https://security.gentoo.org/glsa/202107-06
202208-25 https://security.gentoo.org/glsa/202208-25
990079 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=990079
ASA-202106-31 https://security.archlinux.org/ASA-202106-31
ASA-202106-32 https://security.archlinux.org/ASA-202106-32
AVG-2057 https://security.archlinux.org/AVG-2057
AVG-2058 https://security.archlinux.org/AVG-2058
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:33:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
CVE-2021-30551 https://nvd.nist.gov/vuln/detail/CVE-2021-30551
ETMZL6IHCTCTREEL434BQ4THQ7EOHJ43 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ETMZL6IHCTCTREEL434BQ4THQ7EOHJ43/
PAT6EOXVQFE6JFMFQF4IKAOUQSHMHL54 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PAT6EOXVQFE6JFMFQF4IKAOUQSHMHL54/
stable-channel-update-for-desktop.html https://chromereleases.googleblog.com/2021/06/stable-channel-update-for-desktop.html
Data source KEV
Date added Nov. 3, 2021
Description Google Chromium V8 Engine contains a type confusion vulnerability that allows a remote attacker to potentially exploit heap corruption via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.
Required action Apply updates per vendor instructions.
Due date Nov. 17, 2021
Note 
https://nvd.nist.gov/vuln/detail/CVE-2021-30551
Ransomware campaign use Unknown
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://chromereleases.googleblog.com/2021/06/stable-channel-update-for-desktop.html
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: SSVCv2/E:A/A:N/T:T/P:M/B:A/M:M/D:A/2025-01-29T16:53:02Z/ Found at https://chromereleases.googleblog.com/2021/06/stable-channel-update-for-desktop.html
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://crbug.com/1216437
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: SSVCv2/E:A/A:N/T:T/P:M/B:A/M:M/D:A/2025-01-29T16:53:02Z/ Found at https://crbug.com/1216437
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
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:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ETMZL6IHCTCTREEL434BQ4THQ7EOHJ43/
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: SSVCv2/E:A/A:N/T:T/P:M/B:A/M:M/D:A/2025-01-29T16:53:02Z/ Found at https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ETMZL6IHCTCTREEL434BQ4THQ7EOHJ43/
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PAT6EOXVQFE6JFMFQF4IKAOUQSHMHL54/
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: SSVCv2/E:A/A:N/T:T/P:M/B:A/M:M/D:A/2025-01-29T16:53:02Z/ Found at https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PAT6EOXVQFE6JFMFQF4IKAOUQSHMHL54/
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2021-30551
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-2021-30551
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:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://security.gentoo.org/glsa/202107-06
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: SSVCv2/E:A/A:N/T:T/P:M/B:A/M:M/D:A/2025-01-29T16:53:02Z/ Found at https://security.gentoo.org/glsa/202107-06
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://security.gentoo.org/glsa/202208-25
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: SSVCv2/E:A/A:N/T:T/P:M/B:A/M:M/D:A/2025-01-29T16:53:02Z/ Found at https://security.gentoo.org/glsa/202208-25
Exploit Prediction Scoring System (EPSS)
Percentile 0.98507
EPSS Score 0.67595
Published At Aug. 17, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:33:17.105243+00:00 Alpine Linux Importer Import https://secdb.alpinelinux.org/v3.14/community.json 37.0.0