# CVE-2020-1312: Windows Installer Elevation of Privilege Vulnerability CVE-2020-1312 is fixed in 24 products on 1 platform, first by KB4561602, released June 9, 2020. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2020-1312 - Priority: High - CVSS: n/a (Important) - EPSS: 0.0075 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Vendor exploitability assessment: Exploitation Less Likely - Published: Jun 9, 2020 - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1312 ## Description

An elevation of privilege vulnerability exists in Windows Installer because of the way Windows Installer handles certain filesystem operations.

To exploit the vulnerability, an attacker would require unprivileged execution on the victim system. After successfully exploiting the vulnerability, an attacker could run arbitrary code with elevated privileges. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

The security update addresses the vulnerability by correcting the way Windows Installer handles certain filesystem operations.

## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Microsoft | Windows 10 Version 1709 for 32-bit Systems | 16299.1932 | [KB4561602](https://patchblox.com/security/data/fix/microsoft/kb4561602.md) | Jun 9, 2020 | | Microsoft | Windows 10 Version 1709 for ARM64-based Systems | 16299.1932 | [KB4561602](https://patchblox.com/security/data/fix/microsoft/kb4561602.md) | Jun 9, 2020 | | Microsoft | Windows 10 Version 1709 for x64-based Systems | 16299.1932 | [KB4561602](https://patchblox.com/security/data/fix/microsoft/kb4561602.md) | Jun 9, 2020 | | Microsoft | Windows 10 Version 1803 for 32-bit Systems | 17134.1550 | [KB4561621](https://patchblox.com/security/data/fix/microsoft/kb4561621.md) | Jun 9, 2020 | | Microsoft | Windows 10 Version 1803 for ARM64-based Systems | 17134.1550 | [KB4561621](https://patchblox.com/security/data/fix/microsoft/kb4561621.md) | Jun 9, 2020 | | Microsoft | Windows 10 Version 1803 for x64-based Systems | 17134.1550 | [KB4561621](https://patchblox.com/security/data/fix/microsoft/kb4561621.md) | Jun 9, 2020 | | Microsoft | Windows 10 Version 1809 for 32-bit Systems | 17763.1282 | [KB4561608](https://patchblox.com/security/data/fix/microsoft/kb4561608.md) | Jun 9, 2020 | | Microsoft | Windows 10 Version 1809 for ARM64-based Systems | 17763.1282 | [KB4561608](https://patchblox.com/security/data/fix/microsoft/kb4561608.md) | Jun 9, 2020 | | Microsoft | Windows 10 Version 1809 for x64-based Systems | 17763.1282 | [KB4561608](https://patchblox.com/security/data/fix/microsoft/kb4561608.md) | Jun 9, 2020 | | Microsoft | Windows 10 Version 1903 for 32-bit Systems | | [KB4560960](https://patchblox.com/security/data/fix/microsoft/kb4560960.md) | Jun 9, 2020 | | Microsoft | Windows 10 Version 1903 for ARM64-based Systems | | [KB4560960](https://patchblox.com/security/data/fix/microsoft/kb4560960.md) | Jun 9, 2020 | | Microsoft | Windows 10 Version 1903 for x64-based Systems | | [KB4560960](https://patchblox.com/security/data/fix/microsoft/kb4560960.md) | Jun 9, 2020 | | Microsoft | Windows 10 Version 1909 for 32-bit Systems | | [KB4560960](https://patchblox.com/security/data/fix/microsoft/kb4560960.md) | Jun 9, 2020 | | Microsoft | Windows 10 Version 1909 for ARM64-based Systems | | [KB4560960](https://patchblox.com/security/data/fix/microsoft/kb4560960.md) | Jun 9, 2020 | | Microsoft | Windows 10 Version 1909 for x64-based Systems | | [KB4560960](https://patchblox.com/security/data/fix/microsoft/kb4560960.md) | Jun 9, 2020 | | Microsoft | Windows 10 Version 2004 for 32-bit Systems | 19041.329 | [KB4557957](https://patchblox.com/security/data/fix/microsoft/kb4557957.md) | Jun 9, 2020 | | Microsoft | Windows 10 Version 2004 for ARM64-based Systems | 19041.329 | [KB4557957](https://patchblox.com/security/data/fix/microsoft/kb4557957.md) | Jun 9, 2020 | | Microsoft | Windows 10 Version 2004 for x64-based Systems | 19041.329 | [KB4557957](https://patchblox.com/security/data/fix/microsoft/kb4557957.md) | Jun 9, 2020 | | Microsoft | Windows Server 2019 | 17763.1282 | [KB4561608](https://patchblox.com/security/data/fix/microsoft/kb4561608.md) | Jun 9, 2020 | | Microsoft | Windows Server 2019 (Server Core installation) | 17763.1282 | [KB4561608](https://patchblox.com/security/data/fix/microsoft/kb4561608.md) | Jun 9, 2020 | | Microsoft | Windows Server, version 1803 (Server Core Installation) | 17134.1550 | [KB4561621](https://patchblox.com/security/data/fix/microsoft/kb4561621.md) | Jun 9, 2020 | | Microsoft | Windows Server, version 1903 (Server Core installation) | | [KB4560960](https://patchblox.com/security/data/fix/microsoft/kb4560960.md) | Jun 9, 2020 | | Microsoft | Windows Server, version 1909 (Server Core installation) | | [KB4560960](https://patchblox.com/security/data/fix/microsoft/kb4560960.md) | Jun 9, 2020 | | Microsoft | Windows Server, version 2004 (Server Core installation) | 19041.329 | [KB4557957](https://patchblox.com/security/data/fix/microsoft/kb4557957.md) | Jun 9, 2020 | --- Data as of 2026-11-08T00:53:09Z 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.