Live › vulnerability › CVE-2021-26411
Go to dashboardMicrosoft Internet Explorer has a memory corruption flaw that attackers have used in real attacks, and CISA lists it as known exploited. A successful exploit can let an attacker run code on the victim's machine.
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 |
|---|---|---|---|
| Microsoft Internet Explorer | vendor | – | – |
Run reg query "HKLM\SOFTWARE\Microsoft\Internet Explorer" /v svcVersion or check Internet Explorer's version under Help > About; unknown for other checks.
Apply the Microsoft security update for CVE-2021-26411 per vendor instructions; unknown for the exact KB number in these sources.
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
Microsoft Internet Explorer contains an unspecified vulnerability that allows for memory corruption.
CISA required action: Apply updates per vendor instructions.
This page as .md · .json · in your agent: get_signal("CVE-2021-26411")
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.