CVE-2021-30554VulnerabilityPublished 11/03/2021Updated 10/24/2026

CVE-2021-30554: Google Chromium WebGL Use-After-Free Vulnerability

Affects Google Chromium WebGLSource 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: 7.4% chance of exploitation in 30 days – higher than 94% of CVEs

What to do

CISA required action

Apply updates per vendor instructions.

nvd.nist.gov/vuln/detail/CVE-2021-30554 (opens in a new tab)

Description

CVE-2021-30554 is a use-after-free vulnerability in Google Chromium's WebGL component that allows remote attackers to potentially cause heap corruption via crafted HTML pages. This vulnerability affects multiple Chromium-based browsers such as Google Chrome, Microsoft Edge, and Opera. It has been exploited in the wild, indicating active threat usage. No explicit patch or remediation details are provided in the input data.

Summary

Google Chromium WebGL contains a use-after-free vulnerability (CWE-416) that can be triggered by a remote attacker through a specially crafted HTML page, potentially leading to heap corruption. This vulnerability impacts multiple browsers built on Chromium, including Google Chrome, Microsoft Edge, and Opera. Exploitation in the wild has been confirmed, underscoring the real-world risk. The input data does not specify affected versions or patch availability.

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 presence of known exploits in the wild increases the urgency and risk associated with this vulnerability.

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 confirmed, consider limiting exposure to untrusted web content.

Weaknesses

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

What to do

Description

AnalysisAI-generated, updated 10/24/2026, 09:21:03 UTC

Weaknesses

References

Related threats