CVE-2018-8440
High 7.8 Exploited in the wild (KEV) Used in ransomware campaigns
Confirmed active exploitation — CISA KEV catalog
- Name
- Microsoft Windows Privilege Escalation Vulnerability
- Added to catalog
- Remediation due date (US federal)
- Required action
- Apply updates per vendor instructions.
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.
Metrics
- CVSS 3.1
-
7.8 (HIGH)
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 19% (percentile: 97) as of 1 November 2026
Affected products
microsoft: windows 10 1607; microsoft: windows 10 1703; microsoft: windows 10 1709; microsoft: windows 10 1803; microsoft: windows 7; microsoft: windows 8.1; microsoft: windows rt 8.1; microsoft: windows server 2008; microsoft: windows server 2012; microsoft: windows server 2016
References
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8440 PatchVendor Advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8440 PatchVendor Advisory
- https://blog.0patch.com/2018/08/how-we-micropatched-publicly-dropped.html ExploitPatchThird Party Advisory
- https://blog.0patch.com/2018/08/how-we-micropatched-publicly-dropped.html ExploitPatchThird Party Advisory
- http://www.securityfocus.com/bid/105153 Third Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1041578 Third Party AdvisoryVDB Entry
- https://blog.0patch.com/2018/09/comparing-our-micropatch-with.html Third Party Advisory
- http://www.securityfocus.com/bid/105153 Third Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1041578 Third Party AdvisoryVDB Entry
- https://blog.0patch.com/2018/09/comparing-our-micropatch-with.html Third Party Advisory