Live › vulnerability › CVE-2021-21206
Go to dashboardA use-after-free bug in Chromium's Blink rendering engine lets a remote attacker corrupt heap memory by serving a crafted HTML page. Attackers can use this to run code inside the browser when a user visits the page, and CISA lists it as actively exploited.
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 Blink | vendor | – | – |
Open chrome://version (or edge://version, opera://version) and compare the Chromium version with the fixed release in the vendor advisory.
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
Google Chromium Blink contains a use-after-free 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-2021-21206")
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.