עברית

Vulnerability Intelligence

CVE-2021-21166

High 8.8 Exploited in the wild (KEV)

Published
Last modified
NVD status
Analyzed

CISA KEV catalog

Confirmed active exploitation.

Listed in CISA's catalog of Known Exploited Vulnerabilities: attackers are using it in real attacks. Patch it with priority.

CISA KEV
Name
Google Chromium Race Condition Vulnerability
Added to catalog
Remediation due date (US federal)
Required action
Apply updates per vendor instructions.

Description

Data race in audio in Google Chrome prior to 89.0.4389.72 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Affected products

google: chrome; fedoraproject: fedora; debian: debian linux

References10

Metrics

CVSS 3.1
8.8 HIGH Score source: NVD CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS — exploit probability
24% percentile: 98 · as of 2 November 2026
CWE
CWE-362

Could this be exploited in your environment?

A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.