CVE & CISA-KEV Catalog

CVE-2021-21166

HIGHCISA KEVEPSS 98th pctl

8.8

CVSS v3

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.

CWE-362Race Condition

How to fix

Remediation Available

chromiumDebian

Fixed in:89.0.4389.82-1CVE-2021-21166

Fixed in:89.0.4389.82-1CVE-2021-21166

Fixed in:89.0.4389.82-1CVE-2021-21166

Fixed in:89.0.4389.82-1CVE-2021-21166

Google ChromeWindows application

Affected:89.0.4389.72Fixed in:89.0.4389.72Google LLC

Google Chrome (EXE)Windows application

Affected:89.0.4389.72Fixed in:89.0.4389.72Google LLC

Google Chrome BetaWindows application

Affected:89.0.4389.72Fixed in:89.0.4389.72Google LLC

Google Chrome Beta (EXE)Windows application

Affected:89.0.4389.72Fixed in:89.0.4389.72Google LLC

Google Chrome CanaryWindows application

Affected:89.0.4389.72Fixed in:89.0.4389.72Google LLC

Google Chrome DevWindows application

Affected:89.0.4389.72Fixed in:89.0.4389.72Google LLC

Google Chrome Dev (EXE)Windows application

Affected:89.0.4389.72Fixed in:89.0.4389.72Google LLC

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploit Intelligence

26.52%probability of exploitation in 30 days

98thpercentile

Very high risk: more likely to be exploited than 98% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

Google Chromium Race Condition Vulnerability

Google Chromium contains a race condition 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.

Apply updates per vendor instructions.

Remediation due: 2021-11-17

References

Third-Party Advisory2

Government Resource1

cisa.gov

Release Notes4

Other references1

crbug.com

Related Vulnerabilities

Other CWE-362 (Race Condition) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-6387	High	8.1	100%	-	Fix
CVE-2023-36884	High	7.5	99%	KEV + Ransom	Fix
CVE-2018-15473	Medium	5.3	99%	-	Fix
CVE-2024-27983	High	8.2	87%	-	Fix
CVE-2014-0226	Medium	6.8	86%	-	Fix
CVE-2016-5195	High	7.0	84%	KEV	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-10-24.