Live › vulnerability › CVE-2021-40450
Go to dashboardMicrosoft Win32k, the Windows kernel-mode graphics subsystem, contains a flaw that lets a local user escalate privileges. Attackers exploit it in the wild, so a low-privilege foothold can become full control of the Windows 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 Win32k | vendor | – | – |
Unknown from the sources.
Apply the Microsoft security update for CVE-2021-40450 per vendor instructions (CISA required action); the specific patched build is unknown from the sources.
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
Microsoft Win32k contains an unspecified vulnerability that allows for privilege escalation.
CISA required action: Apply updates per vendor instructions.
This page as .md · .json · in your agent: get_signal("CVE-2021-40450")
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.