CVE-2018-8440

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.

Score

CVSS 3.1 7.8 High

Status

Analyzed - secure@microsoft.com

Published

2018-09-13

Last modified

2025-10-21

Known exploited (CISA KEV)

since 2022-03-28, action due 2022-04-18: Apply updates per vendor instructions.

Affected products

• Windows 10 (Microsoft)
• Windows 10 1607 (Microsoft)
• Windows 10 1703 (Microsoft)
• Windows 10 1709 (Microsoft)
• Windows 10 1803 (Microsoft)
• Windows 10 Servers (Microsoft)
• Windows 7 (Microsoft)
• Windows 8.1 (Microsoft)
• Windows Rt 8.1 (Microsoft)
• Windows Server 2008 (Microsoft)
• Windows Server 2008 R2 (Microsoft)
• Windows Server 2012 (Microsoft)
• Windows Server 2012 R2 (Microsoft)
• Windows Server 2016 (Microsoft)

References

• http://www.securityfocus.com/bid/105153
• http://www.securitytracker.com/id/1041578
• https://blog.0patch.com/2018/08/how-we-micropatched-publicly-dropped.html
• https://blog.0patch.com/2018/09/comparing-our-micropatch-with.html
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8440
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-8440