# CVE-2020-1306: Windows Runtime Elevation of Privilege Vulnerability

CVE-2020-1306 is fixed in 21 products on 1 platform, first by KB4561621, released June 9, 2020. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2020-1306
- Priority: High
- CVSS: 7.8 (Important)
- EPSS: 0.0081
- 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-2020-1306

## Description

<p>An elevation of privilege vulnerability exists when the Windows Runtime improperly handles objects in memory. An attacker who successfully exploited this vulnerability could run arbitrary code in an elevated context.</p> <p>An attacker could exploit this vulnerability by running a specially crafted application on the victim system.</p> <p>The update addresses the vulnerability by correcting the way the Windows Runtime handles objects in memory.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| 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 |

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