Is CVE-2021-30554 actively exploited?

Yes. CVE-2021-30554 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2021-30554 be exploited remotely?

The attack vector of CVE-2021-30554 has not been classified yet.

What is the CVSS score of CVE-2021-30554?

CVE-2021-30554 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2021-30554

HIGHCISA KEVIN THE WILD

CVE-2021-30554

Published: November 3, 2021

EPSS:2.00%probability of exploitation in 30 daysPercentile:83.4th

Official Description

Google Chromium WebGL contains a use-after-free vulnerability that allows a remote attacker to potentially exploit heap corruption via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.

NVD Source

CISA KEV Advisory

Google Chromium WebGL Use-After-Free Vulnerability

Added to KEV: 2021-11-03Federal patch deadline: 2021-11-17

Required Action (CISA)

Apply updates per vendor instructions.

Risk Analysis

This use-after-free vulnerability in Google Chromium WebGL could allow a remote attacker to exploit heap corruption via a crafted HTML page. Despite the absence of a CVSS score, its HIGH severity and confirmed exploitation in the wild by CISA make it a critical vulnerability. The EPSS score of 0.02003, while low, is superseded by the confirmed active exploitation.

This vulnerability is actively being exploited in the wild, as confirmed by its inclusion in CISA's KEV catalog. It is remotely exploitable, allowing an attacker to potentially exploit heap corruption through a crafted HTML page.

Recommended Action

Users of web browsers utilizing Chromium, including Google Chrome, Microsoft Edge, and Opera, should update to the latest versions. Disabling WebGL in environments where it is not required can also reduce exposure.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2021-30554 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2021-30554 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.