Live › vulnerability › CVE-2021-34484
Go to dashboardMicrosoft Windows User Profile Service has a flaw that lets a local user raise their privileges. An attacker who already has a foothold on the machine can gain SYSTEM-level control.
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 | – | – |
Check the installed Windows build against Microsoft's security update guide for CVE-2021-34484; the sources do not give a command.
Apply the Microsoft update for CVE-2021-34484 per vendor instructions, as CISA requires; the sources do not name the KB or build.
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
Microsoft Windows User Profile Service 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-2021-34484")
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.