What is CVE-2021-21206?

CVE-2021-21206 is a vulnerability in Google Chrome. Published 2021-04-26.

Is CVE-2021-21206 known to be exploited?

Yes. CVE-2021-21206 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 4 public proof-of-concept repositories are indexed.

Vulnerability in Google Chrome

CVE-2021-21206

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.

EPSS: 0.175 (95.2th percentile) — read the EPSS interpretation.

Affected products

Google Chrome — versions unspecified

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2021-11-03. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2021-11-17.

Required action: Apply updates per vendor instructions.

Public proof-of-concept exploits

References

crbug.com/1196781 (x_refsource_MISC)
chromereleases.googleblog.com/2021/04/stable-channel-update-for-desktop.html (x_refsource_MISC)
GLSA-202104-08 (vendor-advisory, x_refsource_GENTOO)
FEDORA-2021-c3754414e7 (vendor-advisory, x_refsource_FEDORA)
FEDORA-2021-ff893e12c5 (vendor-advisory, x_refsource_FEDORA)
FEDORA-2021-35d2bb4627 (vendor-advisory, x_refsource_FEDORA)

Frequently asked questions

What is CVE-2021-21206?: CVE-2021-21206 is a vulnerability in Google Chrome. Published 2021-04-26.
Is CVE-2021-21206 known to be exploited?: Yes. CVE-2021-21206 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 4 public proof-of-concept repositories are indexed.