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Case File

CVE-2021-37973

CRITICAL · CVSS 9.6 EPSS 11.73% CISA KEV · Actively Exploited

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-10-08 · Last synced 2026-08-04

CyberRota Analysis

This is a critical severity vulnerability with a CVSS score of 9.6. It affects Chrome. It is listed in CISA's Known Exploited Vulnerabilities catalog, indicating confirmed active exploitation in the wild. Its EPSS score suggests a 11.7% probability of exploitation in the next 30 days. It may be remotely exploitable.

CISA KEV Details

Status: This CVE is listed in CISA's Known Exploited Vulnerabilities catalog.

Ransomware use: Unknown

Added to KEV: 2021-11-03

Required action: Apply updates per vendor instructions.

CVE
CVE-2021-37973
Severity
CRITICAL
CVSS
9.6
EPSS
11.73%
Chrome

Original NVD Description

Use after free in Portals in Google Chrome prior to 94.0.4606.61 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page.

Related CVEs

Other vulnerabilities affecting the same vendor(s)