CVE-2021-37975VulnerabilityPublished 11/03/2021Updated 10/24/2026

CVE-2021-37975: Google Chromium V8 Use-After-Free Vulnerability

Affects Google Chromium V8Source CISA KEV

Severity

High

No CVSS score published yet

Exploitation: Actively exploited – in CISA KEV since 11/03/2021
KEV deadline: 11/17/2021
EPSS: 34.9% chance of exploitation in 30 days – higher than 98% of CVEs

What to do

CISA required action

Apply updates per vendor instructions.

nvd.nist.gov/vuln/detail/CVE-2021-37975 (opens in a new tab)

Description

CVE-2021-37975 is a use-after-free vulnerability in the Google Chromium V8 JavaScript engine. It allows a remote attacker to potentially cause heap corruption by crafting a malicious HTML page. This vulnerability affects multiple Chromium-based web browsers such as Google Chrome, Microsoft Edge, and Opera. It has been exploited in the wild. No specific affected versions or patch information is provided in the input data.

Summary

The Google Chromium V8 engine contains a use-after-free vulnerability (CWE-416) that can be triggered remotely via a specially crafted HTML page. This flaw may lead to heap corruption, enabling potential exploitation by attackers. The vulnerability impacts multiple browsers built on Chromium, including Google Chrome, Microsoft Edge, and Opera. Exploitation in the wild has been confirmed. However, no details on affected versions or available patches are provided in the source data.

Impact

Successful exploitation of this use-after-free vulnerability can lead to heap corruption, which may allow remote attackers to execute arbitrary code or cause denial of service in affected Chromium-based browsers. The vulnerability has been observed to be exploited in the wild, indicating active threat. The exact impact depends on the browser and environment but is considered high severity.

Mitigation

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Users and administrators should monitor official Google Chromium security advisories for updates and apply patches promptly once available. Until a fix is applied, cautious browsing and limiting exposure to untrusted web content may reduce risk.

Weaknesses

CWE-416Use After Free (opens in a new tab)

What to do

Description

AnalysisAI-generated, updated 10/24/2026, 09:25:57 UTC

Weaknesses

References

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