Live › vulnerability › CVE-2023-21674
Go to dashboardMicrosoft Windows' Advanced Local Procedure Call (ALPC) component has an unspecified flaw that lets a local user escalate privileges. Exploitation is confirmed in the wild, per CISA's Known Exploited Vulnerabilities catalog.
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 | – | – |
| microsoft windows 10 1507 | vendor | < 10.0.10240.19685 | 10.0.10240.19685 |
| microsoft windows 10 1607 | vendor | < 10.0.14393.5648 | 10.0.14393.5648 |
| microsoft windows 10 1809 | vendor | < 10.0.17763.3887 | 10.0.17763.3887 |
| microsoft windows 10 20h2 | vendor | < 10.0.19042.2486 | 10.0.19042.2486 |
| microsoft windows 10 21h2 | vendor | < 10.0.19044.2486 | 10.0.19044.2486 |
| microsoft windows 10 22h2 | vendor | < 10.0.19045.2486 | 10.0.19045.2486 |
| microsoft windows 11 21h2 | vendor | < 10.0.22000.1455 | 10.0.22000.1455 |
| microsoft windows 11 22h2 | vendor | < 10.0.22621.1105 | 10.0.22621.1105 |
| microsoft windows rt 8.1 | vendor | – | – |
| microsoft windows server 2012 | vendor | = r2 | – |
| microsoft windows server 2016 | vendor | < 10.0.14393.5648 | 10.0.14393.5648 |
| microsoft windows server 2019 | vendor | < 10.0.17763.3887 | 10.0.17763.3887 |
| microsoft windows server 2022 | vendor | < 10.0.20348.1487 | 10.0.20348.1487 |
Unknown from the sources.
Apply the Microsoft Windows security update per vendor instructions (CISA required action); the specific KB or build is unknown from these sources.
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
Microsoft Windows Advanced Local Procedure Call (ALPC) 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-2023-21674")
CISA KEV catalog, Creative Commons 0 · NVD data is provided by NIST and is public domain. Posts quoted belong to their authors.