Is CVE-2021-30563 actively exploited?

Yes. CVE-2021-30563 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2021-30563 be exploited remotely?

The attack vector of CVE-2021-30563 has not been classified yet.

What is the CVSS score of CVE-2021-30563?

CVE-2021-30563 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2021-30563

HIGHCISA KEVIN THE WILD

CVE-2021-30563

Published: November 3, 2021

EPSS:3.10%probability of exploitation in 30 daysPercentile:86.6th

Official Description

Google Chromium V8 Engine contains a type confusion 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 Type Confusion Vulnerability

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

Required Action (CISA)

Apply updates per vendor instructions.

Risk Analysis

A high-severity type confusion vulnerability in the Google Chromium V8 Engine allows a remote attacker to potentially exploit heap corruption via a crafted HTML page. This flaw affects multiple web browsers utilizing Chromium. Its inclusion in CISA's KEV catalog and an EPSS score of 0.03101 signify it as a confirmed and actively exploited vulnerability.

This vulnerability is actively being exploited in the wild, as confirmed by CISA's KEV catalog. A remote attacker can trigger the vulnerability by enticing a user to visit a crafted HTML page.

Recommended Action

Users should ensure their web browsers, including Google Chrome, Microsoft Edge, and Opera, are updated to the latest versions. Regularly patching and keeping browsers up-to-date is crucial for mitigating this type of client-side vulnerability.

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-2021-30563 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-2021-30563 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.