Live › vulnerability › CVE-2021-40449
Go to dashboardA flaw in the Windows Win32k kernel driver lets a logged-in user raise their privileges on the machine. CISA lists it as actively exploited, and ransomware campaigns have used it.
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 Windows | vendor | – | – |
Unknown from the sources. In the analyst’s queue.
Apply the Microsoft security update for CVE-2021-40449 per vendor instructions (CISA KEV required action).
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
Unspecified vulnerability allows for an authenticated user to escalate privileges.
CISA required action: Apply updates per vendor instructions.
This page as .md · .json · in your agent: get_signal("CVE-2021-40449")
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.