Is CVE-2021-30551 actively exploited?

Yes. CVE-2021-30551 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2021-30551 be exploited remotely?

The attack vector of CVE-2021-30551 has not been classified yet.

What is the CVSS score of CVE-2021-30551?

CVE-2021-30551 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2021-30551

HIGHCISA KEVIN THE WILD

CVE-2021-30551

Published: November 3, 2021

EPSS:77.16%probability of exploitation in 30 daysPercentile:98.9th

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

The Google Chromium V8 Engine contains a type confusion vulnerability that could lead to heap corruption and remote code execution via a crafted HTML page. This is a high-severity flaw with an EPSS score of 0.77157, indicating a high likelihood of exploitation, and it is confirmed to be exploited in the wild.

This vulnerability is actively exploited in the wild and is part of CISA's Known Exploited Vulnerabilities Catalog. Exploitation typically occurs when a user visits a malicious website containing a crafted HTML page.

Recommended Action

Users should update their web browsers, including Google Chrome, Microsoft Edge, and Opera, to the latest versions that incorporate the patched Chromium V8 Engine. Exercise caution when visiting untrusted websites.

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-2021-30551 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-2021-30551 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.