Is CVE-2021-30632 actively exploited?

Yes. CVE-2021-30632 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2021-30632 be exploited remotely?

The attack vector of CVE-2021-30632 has not been classified yet.

What is the CVSS score of CVE-2021-30632?

CVE-2021-30632 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2021-30632

HIGHCISA KEVIN THE WILD

CVE-2021-30632

Published: November 3, 2021

EPSS:84.93%probability of exploitation in 30 daysPercentile:99.3th

Official Description

Google Chromium V8 Engine contains an out-of-bounds write 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 V8 Out-of-Bounds Write Vulnerability

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

Required Action (CISA)

Apply updates per vendor instructions.

Risk Analysis

This out-of-bounds write vulnerability in the Google Chromium V8 Engine can lead to heap corruption, potentially allowing a remote attacker to exploit it via a crafted HTML page. Given its high EPSS score of 0.84934, there is a very high likelihood of exploitation, and its presence in the KEV catalog confirms active exploitation. This is an urgent risk for users of Chromium-based browsers.

This vulnerability is actively being exploited in the wild and is listed in CISA's Known Exploited Vulnerabilities catalog. It is remotely exploitable through malicious HTML pages, affecting multiple web browsers that use Chromium.

Recommended Action

Users should ensure their web browsers, including Google Chrome, Microsoft Edge, and Opera, are updated to the latest available versions. Regularly apply security updates for all Chromium-based applications.

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-2021-30632 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-2021-30632 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.