Live › vulnerability › CVE-2021-21148
Go to dashboardA heap buffer overflow in the Chromium V8 JavaScript engine lets a remote attacker corrupt heap memory by serving a crafted HTML page. Exploitation in the wild is listed in CISA's KEV catalog, which means an attacker can likely run code in the browser's renderer.
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 V8 | vendor | – | – |
Check the installed browser version (chrome://version in Chrome, edge://version in Edge) and compare it to the fixed release the vendor published.
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
Google Chromium V8 Engine contains a heap buffer overflow 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-2021-21148")
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.