# CVE-2019-0943: Windows ALPC Elevation of Privilege Vulnerability CVE-2019-0943 is fixed in 36 products on 1 platform, first by KB4503267, released June 11, 2019. It is not reported as exploited, but the vendor rates exploitation more likely. Patch Radar priority: Urgent. - Web page: https://patchblox.com/security/cve/CVE-2019-0943 - Priority: Urgent - CVSS: 7.8 (Important) - EPSS: 0.0237 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Vendor exploitability assessment: Exploitation More Likely - Published: Jun 11, 2019 - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2019-0943 ## 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 | 14393.3025 | [KB4503267](https://patchblox.com/security/data/fix/microsoft/kb4503267.md) | Jun 11, 2019 | | Microsoft | Windows 10 Version 1607 for x64-based Systems | 14393.3025 | [KB4503267](https://patchblox.com/security/data/fix/microsoft/kb4503267.md) | Jun 11, 2019 | | Microsoft | Windows 10 Version 1703 for 32-bit Systems | 15063.1868 | [KB4503279](https://patchblox.com/security/data/fix/microsoft/kb4503279.md) | Jun 11, 2019 | | Microsoft | Windows 10 Version 1703 for x64-based Systems | 15063.1868 | [KB4503279](https://patchblox.com/security/data/fix/microsoft/kb4503279.md) | Jun 11, 2019 | | Microsoft | Windows 10 Version 1709 for 32-bit Systems | 16299.1217 | [KB4503284](https://patchblox.com/security/data/fix/microsoft/kb4503284.md) | Jun 11, 2019 | | Microsoft | Windows 10 Version 1709 for ARM64-based Systems | 16299.1217 | [KB4503284](https://patchblox.com/security/data/fix/microsoft/kb4503284.md) | Jun 11, 2019 | | Microsoft | Windows 10 Version 1709 for x64-based Systems | 16299.1217 | [KB4503284](https://patchblox.com/security/data/fix/microsoft/kb4503284.md) | Jun 11, 2019 | | Microsoft | Windows 10 Version 1803 for 32-bit Systems | 17134.829 | [KB4503286](https://patchblox.com/security/data/fix/microsoft/kb4503286.md) | Jun 11, 2019 | | Microsoft | Windows 10 Version 1803 for ARM64-based Systems | 17134.829 | [KB4503286](https://patchblox.com/security/data/fix/microsoft/kb4503286.md) | Jun 11, 2019 | | Microsoft | Windows 10 Version 1803 for x64-based Systems | 17134.829 | [KB4503286](https://patchblox.com/security/data/fix/microsoft/kb4503286.md) | Jun 11, 2019 | | Microsoft | Windows 10 Version 1809 for 32-bit Systems | 17763.557 | [KB4503327](https://patchblox.com/security/data/fix/microsoft/kb4503327.md) | Jun 11, 2019 | | Microsoft | Windows 10 Version 1809 for ARM64-based Systems | 17763.557 | [KB4503327](https://patchblox.com/security/data/fix/microsoft/kb4503327.md) | Jun 11, 2019 | | Microsoft | Windows 10 Version 1809 for x64-based Systems | 17763.557 | [KB4503327](https://patchblox.com/security/data/fix/microsoft/kb4503327.md) | Jun 11, 2019 | | Microsoft | Windows 10 Version 1903 for 32-bit Systems | 18362.175 | [KB4503293](https://patchblox.com/security/data/fix/microsoft/kb4503293.md) | Jun 11, 2019 | | Microsoft | Windows 10 Version 1903 for ARM64-based Systems | 18362.175 | [KB4503293](https://patchblox.com/security/data/fix/microsoft/kb4503293.md) | Jun 11, 2019 | | Microsoft | Windows 10 Version 1903 for x64-based Systems | 18362.175 | [KB4503293](https://patchblox.com/security/data/fix/microsoft/kb4503293.md) | Jun 11, 2019 | | Microsoft | Windows 10 for 32-bit Systems | 10240.18244 | [KB4503291](https://patchblox.com/security/data/fix/microsoft/kb4503291.md) | Jun 11, 2019 | | Microsoft | Windows 10 for x64-based Systems | 10240.18244 | [KB4503291](https://patchblox.com/security/data/fix/microsoft/kb4503291.md) | Jun 11, 2019 | | Microsoft | Windows 7 for 32-bit Systems Service Pack 1 | | [KB4503292](https://patchblox.com/security/data/fix/microsoft/kb4503292.md) | Jun 11, 2019 | | Microsoft | Windows 7 for 32-bit Systems Service Pack 1 | | [KB4503269](https://patchblox.com/security/data/fix/microsoft/kb4503269.md) | Jun 11, 2019 | | Microsoft | Windows 7 for x64-based Systems Service Pack 1 | | [KB4503292](https://patchblox.com/security/data/fix/microsoft/kb4503292.md) | Jun 11, 2019 | | Microsoft | Windows 7 for x64-based Systems Service Pack 1 | | [KB4503269](https://patchblox.com/security/data/fix/microsoft/kb4503269.md) | Jun 11, 2019 | | Microsoft | Windows 8.1 for 32-bit systems | | [KB4503276](https://patchblox.com/security/data/fix/microsoft/kb4503276.md) | Jun 11, 2019 | | Microsoft | Windows 8.1 for 32-bit systems | | [KB4503290](https://patchblox.com/security/data/fix/microsoft/kb4503290.md) | Jun 11, 2019 | | Microsoft | Windows 8.1 for x64-based systems | | [KB4503276](https://patchblox.com/security/data/fix/microsoft/kb4503276.md) | Jun 11, 2019 | | Microsoft | Windows 8.1 for x64-based systems | | [KB4503290](https://patchblox.com/security/data/fix/microsoft/kb4503290.md) | Jun 11, 2019 | | Microsoft | Windows RT 8.1 | | [KB4503276](https://patchblox.com/security/data/fix/microsoft/kb4503276.md) | Jun 11, 2019 | | Microsoft | Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 | | [KB4503292](https://patchblox.com/security/data/fix/microsoft/kb4503292.md) | Jun 11, 2019 | | Microsoft | Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 | | [KB4503269](https://patchblox.com/security/data/fix/microsoft/kb4503269.md) | Jun 11, 2019 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 | | [KB4503292](https://patchblox.com/security/data/fix/microsoft/kb4503292.md) | Jun 11, 2019 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 | | [KB4503269](https://patchblox.com/security/data/fix/microsoft/kb4503269.md) | Jun 11, 2019 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | | [KB4503292](https://patchblox.com/security/data/fix/microsoft/kb4503292.md) | Jun 11, 2019 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | | [KB4503269](https://patchblox.com/security/data/fix/microsoft/kb4503269.md) | Jun 11, 2019 | | Microsoft | Windows Server 2012 | | [KB4503285](https://patchblox.com/security/data/fix/microsoft/kb4503285.md) | Jun 11, 2019 | | Microsoft | Windows Server 2012 | | [KB4503263](https://patchblox.com/security/data/fix/microsoft/kb4503263.md) | Jun 11, 2019 | | Microsoft | Windows Server 2012 (Server Core installation) | | [KB4503285](https://patchblox.com/security/data/fix/microsoft/kb4503285.md) | Jun 11, 2019 | | Microsoft | Windows Server 2012 (Server Core installation) | | [KB4503263](https://patchblox.com/security/data/fix/microsoft/kb4503263.md) | Jun 11, 2019 | | Microsoft | Windows Server 2012 R2 | | [KB4503276](https://patchblox.com/security/data/fix/microsoft/kb4503276.md) | Jun 11, 2019 | | Microsoft | Windows Server 2012 R2 | | [KB4503290](https://patchblox.com/security/data/fix/microsoft/kb4503290.md) | Jun 11, 2019 | | Microsoft | Windows Server 2012 R2 (Server Core installation) | | [KB4503276](https://patchblox.com/security/data/fix/microsoft/kb4503276.md) | Jun 11, 2019 | | Microsoft | Windows Server 2012 R2 (Server Core installation) | | [KB4503290](https://patchblox.com/security/data/fix/microsoft/kb4503290.md) | Jun 11, 2019 | | Microsoft | Windows Server 2016 | 14393.3025 | [KB4503267](https://patchblox.com/security/data/fix/microsoft/kb4503267.md) | Jun 11, 2019 | | Microsoft | Windows Server 2016 (Server Core installation) | 14393.3025 | [KB4503267](https://patchblox.com/security/data/fix/microsoft/kb4503267.md) | Jun 11, 2019 | | Microsoft | Windows Server 2019 | 17763.557 | [KB4503327](https://patchblox.com/security/data/fix/microsoft/kb4503327.md) | Jun 11, 2019 | | Microsoft | Windows Server 2019 (Server Core installation) | 17763.557 | [KB4503327](https://patchblox.com/security/data/fix/microsoft/kb4503327.md) | Jun 11, 2019 | | Microsoft | Windows Server, version 1803 (Server Core Installation) | 17134.829 | [KB4503286](https://patchblox.com/security/data/fix/microsoft/kb4503286.md) | Jun 11, 2019 | | Microsoft | Windows Server, version 1903 (Server Core installation) | 18362.175 | [KB4503293](https://patchblox.com/security/data/fix/microsoft/kb4503293.md) | Jun 11, 2019 | --- Data as of 2026-11-08T00:53:09Z UTC. 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