Live › vulnerability › CVE-2021-21166
Go to dashboardA race condition in Chromium's code lets a remote attacker corrupt heap memory using a specially crafted HTML page. Successful exploitation can give an attacker code execution in the browser, and the flaw is listed as exploited in the wild.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 19:11 UTC, 3h before NVD. All times on this page are UTC.
Apply updates per vendor instructions.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| Google Chromium | vendor | – | – |
Open chrome://version (or edge://version, opera://about) and compare the version to the fixed release in the vendor advisory; unknown for the exact fixed version in these sources.
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
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.
CISA required action: Apply updates per vendor instructions.
This page as .md · .json · in your agent: get_signal("CVE-2021-21166")
CISA KEV catalog, Creative Commons 0 · EPSS scores by FIRST, used with attribution · NVD data is provided by NIST and is public domain. Posts quoted belong to their authors.