Is CVE-2018-8440 actively exploited?

CVE-2018-8440 has no public evidence of in-the-wild exploitation as of 2025-10-28.

What is the CVSS score for CVE-2018-8440?

CVE-2018-8440 has a CVSS score of 7.8 (HIGH severity). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

How do I patch CVE-2018-8440?

Patch guidance is available from microsoft security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2018-8440.

Fix CVE-2018-8440 - HIGH microsoft windows 10 1607

Q: Which products are affected by CVE-2018-8440?

12 products: microsoft windows 10 1607, microsoft windows 10 1703, microsoft windows 10 1709, microsoft windows 10 1803, microsoft windows 7, and 7 more.

Description

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.

CVSS Metrics

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector: local
Complexity: low
Privileges: low
User Action: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: NVD-CWE-noinfo

Metadata

Primary Vendor: MICROSOFT
Published: 9/13/2018
Last Modified: 10/28/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

microsoft : windows_10_1607microsoft : windows_10_1703microsoft : windows_10_1709microsoft : windows_10_1803microsoft : windows_7microsoft : windows_8.1microsoft : windows_rt_8.1microsoft : windows_server_2008microsoft : windows_server_2008microsoft : windows_server_2012microsoft : windows_server_2012microsoft : windows_server_2016

Remediation Guidance

Executive Summary

View on NIST NVD