CVE-2021-21224: Google Chromium V8 Type Confusion Vulnerability
Vulnerability summary
CVE-2021-21224 is a high (CVSS 8.8) vulnerability in Google Chromium V8. It is known to be exploited: CISA lists it, first on 03-11-2021. EPSS estimates a 84.17% chance of exploitation in the next 30 days, higher than 99.6% of scored vulnerabilities. 1 public exploit is recorded.
Listed as exploited by CISA (03-11-2021)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 5 · Related 4Timeline
- 26-04-2021PublishedVulnerability first disclosed.
- 03-11-2021Added to CISA KEVExploitedGoogle Chromium V8 Type Confusion Vulnerability
- 17-11-2021CISA remediation dueDeadline passedApply updates per vendor instructions.
- 21-10-2025Last modifiedVulnerability information updated.
Description
Type confusion in V8 in Google Chrome prior to 90.0.4430.85 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page.
CVSS metrics
6 scores · 5 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- NVDNIST8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- OSV · AlpineEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS trend
Probability
84.17%
Chance of exploitation in the next 30 days
Percentile
100%
Versus all other CVEs
30-day change
No change 0.00 pp
From 84.17% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVListed- Added
- 03-11-2021
- Federal due date
- 17-11-2021
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
CISA required action
Apply updates per vendor instructions. nvd.nist.gov/vuln/detail/CVE-2021-21224
Public exploits
1 foundExploit Reference (crbug.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.
Debian2 products
- chromium< 90.0.4430.85-1
- debian_linuxEOL10.0
Alpine1 product
- qt5-qtwebengine< 5.15.3_git20210510-r0
Fedoraproject1 product
- fedoraEOL32 | 33 | 34
Google1 product
- chrome≥ unspecified, < 90.0.4430.85 | < 90.0.4430.85
Ubuntu1 product
- chromium-browser< 90.0.4430.93-0ubuntu0.18.04.1
5 vendors · 6 products
References
13 links- chromereleases.googleblog.com/2021/04/stable-channel-update-for-desktop_20.htmlX Refsource MISCRelease Notes
www.debian.org/security/2021/dsa-4906Vendor AdvisoryX Refsource DEBIANMailing ListThird Party Advisory- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21224Government ResourceUS Government Resource