# CVE-2020-1111: Windows Clipboard Service Elevation of Privilege Vulnerability CVE-2020-1111 is fixed in 13 products on 1 platform, first by KB4551853, released May 12, 2020. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2020-1111 - Priority: High - CVSS: 7.8 (Important) - EPSS: 0.0095 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Vendor exploitability assessment: Exploitation Less Likely - Published: May 12, 2020 - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1111 ## Description

An elevation of privilege vulnerability exists when Windows improperly handles calls to Clipboard Service. 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 Clipboard Service.

## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Microsoft | Windows 10 Version 1809 for 32-bit Systems | 17763.1217 | [KB4551853](https://patchblox.com/security/data/fix/microsoft/kb4551853.md) | May 12, 2020 | | Microsoft | Windows 10 Version 1809 for ARM64-based Systems | 17763.1217 | [KB4551853](https://patchblox.com/security/data/fix/microsoft/kb4551853.md) | May 12, 2020 | | Microsoft | Windows 10 Version 1809 for x64-based Systems | 17763.1217 | [KB4551853](https://patchblox.com/security/data/fix/microsoft/kb4551853.md) | May 12, 2020 | | Microsoft | Windows 10 Version 1903 for 32-bit Systems | | [KB4556799](https://patchblox.com/security/data/fix/microsoft/kb4556799.md) | May 12, 2020 | | Microsoft | Windows 10 Version 1903 for ARM64-based Systems | | [KB4556799](https://patchblox.com/security/data/fix/microsoft/kb4556799.md) | May 12, 2020 | | Microsoft | Windows 10 Version 1903 for x64-based Systems | | [KB4556799](https://patchblox.com/security/data/fix/microsoft/kb4556799.md) | May 12, 2020 | | Microsoft | Windows 10 Version 1909 for 32-bit Systems | | [KB4556799](https://patchblox.com/security/data/fix/microsoft/kb4556799.md) | May 12, 2020 | | Microsoft | Windows 10 Version 1909 for ARM64-based Systems | | [KB4556799](https://patchblox.com/security/data/fix/microsoft/kb4556799.md) | May 12, 2020 | | Microsoft | Windows 10 Version 1909 for x64-based Systems | | [KB4556799](https://patchblox.com/security/data/fix/microsoft/kb4556799.md) | May 12, 2020 | | Microsoft | Windows Server 2019 | 17763.1217 | [KB4551853](https://patchblox.com/security/data/fix/microsoft/kb4551853.md) | May 12, 2020 | | Microsoft | Windows Server 2019 (Server Core installation) | 17763.1217 | [KB4551853](https://patchblox.com/security/data/fix/microsoft/kb4551853.md) | May 12, 2020 | | Microsoft | Windows Server, version 1903 (Server Core installation) | | [KB4556799](https://patchblox.com/security/data/fix/microsoft/kb4556799.md) | May 12, 2020 | | Microsoft | Windows Server, version 1909 (Server Core installation) | | [KB4556799](https://patchblox.com/security/data/fix/microsoft/kb4556799.md) | May 12, 2020 | --- 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