Is CVE-2021-38003 actively exploited?

Yes. CVE-2021-38003 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2021-38003 be exploited remotely?

The attack vector of CVE-2021-38003 has not been classified yet.

What is the CVSS score of CVE-2021-38003?

CVE-2021-38003 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2021-38003

HIGHCISA KEVIN THE WILD

CVE-2021-38003

Published: November 3, 2021

EPSS:71.43%probability of exploitation in 30 daysPercentile:98.7th

Official Description

Google Chromium V8 Engine has a bug in JSON.stringify, where the internal TheHole value can leak to script code, causing memory corruption. 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 Memory Corruption Vulnerability

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

Required Action (CISA)

Apply updates per vendor instructions.

Risk Analysis

This vulnerability in the Google Chromium V8 Engine can lead to memory corruption due to a bug in JSON.stringify, potentially affecting multiple web browsers. The high EPSS score of 0.71433 indicates a significant likelihood of exploitation, and its inclusion in the KEV catalog confirms it has been actively exploited.

This vulnerability has been actively exploited in the wild, as confirmed by its presence in the KEV catalog. Attackers are leveraging this memory corruption flaw in web browsers.

Recommended Action

Ensure all web browsers utilizing the Chromium V8 Engine, such as Google Chrome, Microsoft Edge, and Opera, are updated to their latest versions. Regular browser updates are crucial for mitigating such risks.

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-2021-38003 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-2021-38003 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.