CVE-2021-21220
8.8
HIGH
CVSS 3.1
EPSS 70.4% · 99th pctCISA KEV · Exploited in the wild
2021-04-26•Updated 2025-10-21•KEV 2021-11-03
CISA Known Exploited Vulnerabilities
Google Chromium V8 Improper Input Validation Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.
Added to KEV
2021-11-03
Remediation due
2021-11-17
Required action
Apply updates per vendor instructions.
CISA notes
https://nvd.nist.gov/vuln/detail/CVE-2021-21220
Description
Insufficient validation of untrusted input in V8 in Google Chrome prior to 89.0.4389.128 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
Severity
CVSS 3.1 · CISA8.8 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HSSVC · CISA-ADP
Exploitationactive
Automatableno
Technical impacttotal
Affected Products
| Vendor | Product | Affected versions |
|---|---|---|
| Chrome | unspecified to <89.0.4389.128 |
References
8 LinksOther references
- https://chromereleases.googleblog.com/2021/04/stable-channel-update-for-desktop.html
- https://crbug.com/1196683
- http://packetstormsecurity.com/files/162437/Google-Chrome-XOR-Typer-Out-Of-Bounds-Access-Remote-Code-Execution.html
- http://packetstormsecurity.com/files/176210/Chrome-V8-JIT-XOR-Arbitrary-Code-Execution.html
Record Details
Published
2021-04-26
Last updated
2025-10-21
Assigner (CNA)
Chrome
Credited to
-
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CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.