# 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.

- Page: https://www.vulneraibility.com/cve/CVE-2018-8440
- CVSS: 7.8
- Known exploited: yes, in CISA KEV since 2022-03-28; CISA due date 2022-04-18; known ransomware use
- EPSS: 18.53% (percentile 97.3)
- Public exploit code: 1 Metasploit module · 1 GitHub proof of concept (first 2018-10-31)
- CISA SSVC: exploitation active, automatable no, technical impact total (assessed 2025-02-07)
- Published: 2018-09-13

## Affected versions

- Microsoft Windows 10: affected 32-bit Systems; Version 1607 for 32-bit Systems; Version 1607 for x64-based Systems; Version 1703 for 32-bit Systems; Version 1703 for x64-based Systems; Version 1709 for 32-bit Systems; Version 1709 for x64-based Systems; Version 1803 for 32-bit Systems; Version 1803 for x64-based Systems; x64-based Systems
- Microsoft Windows 10 Servers: affected version 1709  (Server Core Installation); version 1803  (Server Core Installation)
- Microsoft Windows 7: affected 32-bit Systems Service Pack 1; x64-based Systems Service Pack 1
- Microsoft Windows 8.1: affected 32-bit systems; x64-based systems
- Microsoft Windows RT 8.1: affected Windows RT 8.1
- Microsoft Windows Server 2008: affected 32-bit Systems Service Pack 2; 32-bit Systems Service Pack 2 (Server Core installation); Itanium-Based Systems Service Pack 2; x64-based Systems Service Pack 2; x64-based Systems Service Pack 2 (Server Core installation)
- Microsoft Windows Server 2008 R2: affected Itanium-Based Systems Service Pack 1; x64-based Systems Service Pack 1; x64-based Systems Service Pack 1 (Server Core installation)
- Microsoft Windows Server 2012: affected (Server Core installation)
- Microsoft Windows Server 2012 R2: affected (Server Core installation)
- Microsoft Windows Server 2016: affected (Server Core installation)

A version outside these ranges is not a statement that it is unaffected.

## References

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

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.