CISA KEV · Known exploitedHigh

CVE-2021-21224

Google Chromium V8

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
8.8
EPSS
56.2%
99.0% percentile
CISA KEV
Listed
Published
2021.04.27
PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV
Exploit probability56.2%
Technical severityCVSS 8.8

Vulnerability overview

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.

Affected product and versions

Product
Google Chromium V8
Affected versions
unspecified, < 90.0.4430.85, 10.0, 32, 33, 34
Fixed versions
90.0.4430.85

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
CISA required action

Apply updates per vendor instructions.

Due date: 2021.11.17
  1. 1
    Identify

    Confirm that Google Chromium V8 and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
CWE-843
KEV added
2021.11.03
Ransomware use
미확인
CVE-2021-21224 — Google Chromium V8 | SECUFOCUS NOW