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CVE-2018-8440

HighPublished

Microsoft Windows Privilege Escalation Vulnerability

Published: Sep 13, 2018
Updated: Oct 21, 2025
Assigning CNA: microsoft
Evidence observed: Mar 28, 2022

Primary CVSS

7.8/ 10High

nvd · CVSS 3.1

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS probability estimate

18.4%

Moderate · next 30 days

Percentile: 97.2%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

CISA Known Exploited

This CVE appears in the CISA Known Exploited Vulnerabilities catalog.

Summary

An elevation of privilege vulnerability exists when Windows improperly handles calls to Advanced Local Procedure Call (ALPC), aka "Windows ALPC Elevation of Privilege Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers.

Sources

CVE-2018-8440PoC
CVE-2018-8440 standalone exploit
windows-kernel-exploitsResearch
windows-kernel-exploits Windows平台提权漏洞集合

Responsible use

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