# CVE-2019-1129: Windows Elevation of Privilege Vulnerability CVE-2019-1129 is fixed in 18 products on 1 platform, first by KB4507450, released July 9, 2019. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on March 15, 2022, with known ransomware use. Patch Radar priority: Patch now. - Web page: https://patchblox.com/security/cve/CVE-2019-1129 - Priority: Patch now - CVSS: 7.8 (Important) - EPSS: 0.0178 - CISA KEV: listed Mar 15, 2022, federal due date Apr 5, 2022, known ransomware use - Exploited (vendor report): no - Publicly disclosed: yes - Vendor exploitability assessment: Exploitation More Likely - Published: Jul 9, 2019 - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2019-1129 ## Description

An elevation of privilege vulnerability exists when Windows AppX Deployment Service (AppXSVC) improperly handles hard links. An attacker who successfully exploited this vulnerability could run processes in an elevated context. An attacker could then install programs; view, change or delete data.

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 of an affected system.

The security update addresses the vulnerability by correcting how Windows AppX Deployment Service handles hard links.

## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Microsoft | Windows 10 Version 1703 for 32-bit Systems | 15063.1928 | [KB4507450](https://patchblox.com/security/data/fix/microsoft/kb4507450.md) | Jul 9, 2019 | | Microsoft | Windows 10 Version 1703 for x64-based Systems | 15063.1928 | [KB4507450](https://patchblox.com/security/data/fix/microsoft/kb4507450.md) | Jul 9, 2019 | | Microsoft | Windows 10 Version 1709 for 32-bit Systems | 16299.1268 | [KB4507455](https://patchblox.com/security/data/fix/microsoft/kb4507455.md) | Jul 9, 2019 | | Microsoft | Windows 10 Version 1709 for ARM64-based Systems | 16299.1268 | [KB4507455](https://patchblox.com/security/data/fix/microsoft/kb4507455.md) | Jul 9, 2019 | | Microsoft | Windows 10 Version 1709 for x64-based Systems | 16299.1268 | [KB4507455](https://patchblox.com/security/data/fix/microsoft/kb4507455.md) | Jul 9, 2019 | | Microsoft | Windows 10 Version 1803 for 32-bit Systems | 17134.885 | [KB4507435](https://patchblox.com/security/data/fix/microsoft/kb4507435.md) | Jul 9, 2019 | | Microsoft | Windows 10 Version 1803 for ARM64-based Systems | 17134.885 | [KB4507435](https://patchblox.com/security/data/fix/microsoft/kb4507435.md) | Jul 9, 2019 | | Microsoft | Windows 10 Version 1803 for x64-based Systems | 17134.885 | [KB4507435](https://patchblox.com/security/data/fix/microsoft/kb4507435.md) | Jul 9, 2019 | | Microsoft | Windows 10 Version 1809 for 32-bit Systems | 17763.615 | [KB4507469](https://patchblox.com/security/data/fix/microsoft/kb4507469.md) | Jul 9, 2019 | | Microsoft | Windows 10 Version 1809 for ARM64-based Systems | 17763.615 | [KB4507469](https://patchblox.com/security/data/fix/microsoft/kb4507469.md) | Jul 9, 2019 | | Microsoft | Windows 10 Version 1809 for x64-based Systems | 17763.615 | [KB4507469](https://patchblox.com/security/data/fix/microsoft/kb4507469.md) | Jul 9, 2019 | | Microsoft | Windows 10 Version 1903 for 32-bit Systems | 18362.239 | [KB4507453](https://patchblox.com/security/data/fix/microsoft/kb4507453.md) | Jul 9, 2019 | | Microsoft | Windows 10 Version 1903 for ARM64-based Systems | 18362.239 | [KB4507453](https://patchblox.com/security/data/fix/microsoft/kb4507453.md) | Jul 9, 2019 | | Microsoft | Windows 10 Version 1903 for x64-based Systems | 18362.239 | [KB4507453](https://patchblox.com/security/data/fix/microsoft/kb4507453.md) | Jul 9, 2019 | | Microsoft | Windows Server 2019 | 17763.615 | [KB4507469](https://patchblox.com/security/data/fix/microsoft/kb4507469.md) | Jul 9, 2019 | | Microsoft | Windows Server 2019 (Server Core installation) | 17763.615 | [KB4507469](https://patchblox.com/security/data/fix/microsoft/kb4507469.md) | Jul 9, 2019 | | Microsoft | Windows Server, version 1803 (Server Core Installation) | 17134.885 | [KB4507435](https://patchblox.com/security/data/fix/microsoft/kb4507435.md) | Jul 9, 2019 | | Microsoft | Windows Server, version 1903 (Server Core installation) | 18362.239 | [KB4507453](https://patchblox.com/security/data/fix/microsoft/kb4507453.md) | Jul 9, 2019 | --- Data as of 2026-11-07T18:46:35Z 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 Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.