CVE-2021-21166
Google Chromium Race Condition Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.
Required action
Apply updates per vendor instructions.
CISA notes
https://nvd.nist.gov/vuln/detail/CVE-2021-21166
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.
Severity
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HExploitation Context
as of October 13, 2026- CISA added CVE-2021-21166 to the KEV catalog 239 days after its CVE record was published.
- It is one of 75 Google entries in the CISA KEV catalog, and one of 23 added in 2021.
- Its current EPSS score (24.0%) is higher than that of 38% of CISA KEV entries.
Affected Products
| Vendor | Product | Affected versions |
|---|---|---|
Google Chrome | unspecified to <89.0.4389.72 |
References
7 LinksRecord Details
More from Google
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Google Chromium Out of Bounds Memory Access Vulnerability
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CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.