Which products and versions are affected by CVE-2021-21206?

Affected: Chrome (Google) versions >= unspecified; Fedora (Fedoraproject) versions 32, 33, 34; chromium (arch), among others. The full list is in the CVE brief.

Is CVE-2021-21206 being exploited in the wild?

It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Apr 7, 2021.

Is CVE-2021-21206 in the CISA KEV catalog?

Yes. It was added on Nov 3, 2021 with a federal remediation due date of Nov 17, 2021.

Is there a public exploit for CVE-2021-21206?

Public exploit code is available.

How urgently should CVE-2021-21206 be patched?

Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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Vulnerability Intelligence

CVE-2021-21206

HighExploitedPublic exploit

Use after free in Blink in Google Chrome prior to 89.0.4389.128 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Published Apr 26, 2021 · Updated Aug 4, 2026 · Also known as DEBIAN-CVE-2021-21206, UBUNTU-CVE-2021-21206

Key Facts

Patch immediately

CVE-2021-21206 is a high-severity vulnerability (CVSS 8.8 v3.1) affecting Chrome (Google), Fedora (Fedoraproject), chromium (arch) and 7 more products.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Apr 7, 2021. Public exploit code is available.
EPSS estimates a 9.3% probability of exploitation in the next 30 days.
Fixed versions are available, including Chrome 89.0.4389.128, chromedriver 89.0.4389.128-bp152.2.71.1, chromedriver 89.0.4389.128-lp152.2.86.1.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

CVSS v3.1

8.8

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

EPSS (30-day exploit likelihood)

9.3%

Higher than 95.3% of all scored CVEs

Exploited in the wild

Yes

4 catalog listings

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2021-21206 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

Description

Use after free in Blink in Google Chrome prior to 89.0.4389.128 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Known-Exploited Catalog Listings

Catalog	Added	Remediation due	Ransomware use
CISA KEV	Nov 3, 2021	Nov 17, 2021	Not reported
Industry KEV feed	Apr 7, 2021	Nov 17, 2021	Not reported
CIRCL KEV	Nov 3, 2021	Nov 17, 2021	Not reported
ENISA EUVD	Nov 3, 2021	n/a	Not reported

Required action: Apply updates per vendor instructions.

Affected Products

52 affected entries in total

Product	Affected versions	Fixed in
ChromeGoogle	>= unspecified	89.0.4389.128
FedoraFedoraproject	32, 33, 34	n/a
chromiumarch	See advisory	89.0.4389.128-1
operaarch	See advisory	75.0.3969.218-1
vivaldiarch	See advisory	3.7.2218.55-1

5 more affected products in the full CVE brief

Patched Releases

Chrome

89.0.4389.128

chromedriver

89.0.4389.128-bp152.2.71.1, 89.0.4389.128-lp152.2.86.1, 93.0.4577.82-1.1

chromium

89.0.4389.128-1, 89.0.4389.128-bp152.2.71.1, 89.0.4389.128-lp152.2.86.1, 89.0.4389.128-r0, 90.0.4430.72-1, 93.0.4577.82-1.1

chromium-browser

90.0.4430.72-0ubuntu0.16.04.1, 90.0.4430.72-0ubuntu0.18.04.1

opera

75.0.3969.218-1, 76.0.4017.94-lp152.2.43.1

qt5-qtwebengine

5.15.3_git20210510-r0

ungoogled-chromium

113.0.5672.92-1.1

ungoogled-chromium-chromedriver

113.0.5672.92-1.1

vivaldi

3.7.2218.55-1

Timeline

Added to Industry KEV feed
Apr 7, 2021
Publicly disclosed
Apr 26, 2021
Added to CISA KEV
Nov 3, 2021
Added to CIRCL KEV
Nov 3, 2021
Added to ENISA EUVD
Nov 3, 2021
Last updated
Aug 4, 2026

Weakness Type

CWE-416 Use After Free

References

advisoryhttps://crbug.com/1196781
advisoryGLSA-202104-08
advisoryhttps://security-tracker.debian.org/tracker/CVE-2021-21206
advisoryhttps://ubuntu.com/security/CVE-2021-21206
advisoryhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog

8 more references in the full CVE brief

FAQ

Common Questions.

Use after free in Blink in Google Chrome prior to 89.0.4389.128 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
Affected: Chrome (Google) versions >= unspecified; Fedora (Fedoraproject) versions 32, 33, 34; chromium (arch), among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Apr 7, 2021.
Yes. It was added on Nov 3, 2021 with a federal remediation due date of Nov 17, 2021.
Public exploit code is available.
Fixed versions are available, including Chrome 89.0.4389.128, chromedriver 89.0.4389.128-bp152.2.71.1, chromedriver 89.0.4389.128-lp152.2.86.1.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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