# CVE-2018-8440: Windows ALPC Elevation of Privilege Vulnerability CVE-2018-8440 is fixed in 31 products on 1 platform, first by KB4457131, released September 11, 2018. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on March 28, 2022, with known ransomware use. Patch Radar priority: Patch now. - Web page: https://patchblox.com/security/cve/CVE-2018-8440 - Priority: Patch now - CVSS: 7.8 (Important) - EPSS: 0.1853 - CISA KEV: listed Mar 28, 2022, federal due date Apr 18, 2022, known ransomware use - Exploited (vendor report): yes - Publicly disclosed: yes - Vendor exploitability assessment: Exploitation More Likely - Published: Sep 11, 2018 - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2018-8440 ## Description

An elevation of privilege vulnerability exists when Windows improperly handles calls to Advanced Local Procedure Call (ALPC).

An attacker who successfully exploited this vulnerability could run arbitrary code in the security context of the local system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability and take control over an affected system.

The update addresses the vulnerability by correcting how Windows handles calls to ALPC.

## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Microsoft | Windows 10 Version 1607 for 32-bit Systems | 14393.2485 | [KB4457131](https://patchblox.com/security/data/fix/microsoft/kb4457131.md) | Sep 11, 2018 | | Microsoft | Windows 10 Version 1607 for x64-based Systems | 14393.2485 | [KB4457131](https://patchblox.com/security/data/fix/microsoft/kb4457131.md) | Sep 11, 2018 | | Microsoft | Windows 10 Version 1703 for 32-bit Systems | 15063.1324 | [KB4457138](https://patchblox.com/security/data/fix/microsoft/kb4457138.md) | Sep 11, 2018 | | Microsoft | Windows 10 Version 1703 for x64-based Systems | 15063.1324 | [KB4457138](https://patchblox.com/security/data/fix/microsoft/kb4457138.md) | Sep 11, 2018 | | Microsoft | Windows 10 Version 1709 for 32-bit Systems | 16299.665 | [KB4457142](https://patchblox.com/security/data/fix/microsoft/kb4457142.md) | Sep 11, 2018 | | Microsoft | Windows 10 Version 1709 for x64-based Systems | 16299.665 | [KB4457142](https://patchblox.com/security/data/fix/microsoft/kb4457142.md) | Sep 11, 2018 | | Microsoft | Windows 10 Version 1803 for 32-bit Systems | 17134.285 | [KB4457128](https://patchblox.com/security/data/fix/microsoft/kb4457128.md) | Sep 11, 2018 | | Microsoft | Windows 10 Version 1803 for x64-based Systems | 17134.285 | [KB4457128](https://patchblox.com/security/data/fix/microsoft/kb4457128.md) | Sep 11, 2018 | | Microsoft | Windows 10 for 32-bit Systems | 10240.17976 | [KB4457132](https://patchblox.com/security/data/fix/microsoft/kb4457132.md) | Sep 11, 2018 | | Microsoft | Windows 10 for x64-based Systems | 10240.17976 | [KB4457132](https://patchblox.com/security/data/fix/microsoft/kb4457132.md) | Sep 11, 2018 | | Microsoft | Windows 7 for 32-bit Systems Service Pack 1 | | [KB4457144](https://patchblox.com/security/data/fix/microsoft/kb4457144.md) | Sep 11, 2018 | | Microsoft | Windows 7 for 32-bit Systems Service Pack 1 | | [KB4457145](https://patchblox.com/security/data/fix/microsoft/kb4457145.md) | Sep 11, 2018 | | Microsoft | Windows 7 for x64-based Systems Service Pack 1 | | [KB4457144](https://patchblox.com/security/data/fix/microsoft/kb4457144.md) | Sep 11, 2018 | | Microsoft | Windows 7 for x64-based Systems Service Pack 1 | | [KB4457145](https://patchblox.com/security/data/fix/microsoft/kb4457145.md) | Sep 11, 2018 | | Microsoft | Windows 8.1 for 32-bit systems | | [KB4457129](https://patchblox.com/security/data/fix/microsoft/kb4457129.md) | Sep 11, 2018 | | Microsoft | Windows 8.1 for 32-bit systems | | [KB4457143](https://patchblox.com/security/data/fix/microsoft/kb4457143.md) | Sep 11, 2018 | | Microsoft | Windows 8.1 for x64-based systems | | [KB4457129](https://patchblox.com/security/data/fix/microsoft/kb4457129.md) | Sep 11, 2018 | | Microsoft | Windows 8.1 for x64-based systems | | [KB4457143](https://patchblox.com/security/data/fix/microsoft/kb4457143.md) | Sep 11, 2018 | | Microsoft | Windows RT 8.1 | | [KB4457129](https://patchblox.com/security/data/fix/microsoft/kb4457129.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 | | [KB4457144](https://patchblox.com/security/data/fix/microsoft/kb4457144.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 | | [KB4457145](https://patchblox.com/security/data/fix/microsoft/kb4457145.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 | | [KB4457144](https://patchblox.com/security/data/fix/microsoft/kb4457144.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 | | [KB4457145](https://patchblox.com/security/data/fix/microsoft/kb4457145.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | | [KB4457144](https://patchblox.com/security/data/fix/microsoft/kb4457144.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | | [KB4457145](https://patchblox.com/security/data/fix/microsoft/kb4457145.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 | | [KB4457984](https://patchblox.com/security/data/fix/microsoft/kb4457984.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 | | [KB4458010](https://patchblox.com/security/data/fix/microsoft/kb4458010.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) | | [KB4457984](https://patchblox.com/security/data/fix/microsoft/kb4457984.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) | | [KB4458010](https://patchblox.com/security/data/fix/microsoft/kb4458010.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 for Itanium-Based Systems Service Pack 2 | | [KB4457984](https://patchblox.com/security/data/fix/microsoft/kb4457984.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 for Itanium-Based Systems Service Pack 2 | | [KB4458010](https://patchblox.com/security/data/fix/microsoft/kb4458010.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 | | [KB4457984](https://patchblox.com/security/data/fix/microsoft/kb4457984.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 | | [KB4458010](https://patchblox.com/security/data/fix/microsoft/kb4458010.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) | | [KB4457984](https://patchblox.com/security/data/fix/microsoft/kb4457984.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) | | [KB4458010](https://patchblox.com/security/data/fix/microsoft/kb4458010.md) | Sep 11, 2018 | | Microsoft | Windows Server 2012 | | [KB4457135](https://patchblox.com/security/data/fix/microsoft/kb4457135.md) | Sep 11, 2018 | | Microsoft | Windows Server 2012 | | [KB4457140](https://patchblox.com/security/data/fix/microsoft/kb4457140.md) | Sep 11, 2018 | | Microsoft | Windows Server 2012 (Server Core installation) | | [KB4457135](https://patchblox.com/security/data/fix/microsoft/kb4457135.md) | Sep 11, 2018 | | Microsoft | Windows Server 2012 (Server Core installation) | | [KB4457140](https://patchblox.com/security/data/fix/microsoft/kb4457140.md) | Sep 11, 2018 | | Microsoft | Windows Server 2012 R2 | | [KB4457129](https://patchblox.com/security/data/fix/microsoft/kb4457129.md) | Sep 11, 2018 | | Microsoft | Windows Server 2012 R2 | | [KB4457143](https://patchblox.com/security/data/fix/microsoft/kb4457143.md) | Sep 11, 2018 | | Microsoft | Windows Server 2012 R2 (Server Core installation) | | [KB4457129](https://patchblox.com/security/data/fix/microsoft/kb4457129.md) | Sep 11, 2018 | | Microsoft | Windows Server 2012 R2 (Server Core installation) | | [KB4457143](https://patchblox.com/security/data/fix/microsoft/kb4457143.md) | Sep 11, 2018 | | Microsoft | Windows Server 2016 | 14393.2485 | [KB4457131](https://patchblox.com/security/data/fix/microsoft/kb4457131.md) | Sep 11, 2018 | | Microsoft | Windows Server 2016 (Server Core installation) | 14393.2485 | [KB4457131](https://patchblox.com/security/data/fix/microsoft/kb4457131.md) | Sep 11, 2018 | | Microsoft | Windows Server, version 1709 (Server Core Installation) | 16299.665 | [KB4457142](https://patchblox.com/security/data/fix/microsoft/kb4457142.md) | Sep 11, 2018 | | Microsoft | Windows Server, version 1803 (Server Core Installation) | 17134.285 | [KB4457128](https://patchblox.com/security/data/fix/microsoft/kb4457128.md) | Sep 11, 2018 | --- Data as of 2026-11-07T12:40:37Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo