# CVE-2019-1333: Remote Desktop Client Remote Code Execution Vulnerability CVE-2019-1333 is fixed in 41 products on 1 platform, first by KB4519998, released October 8, 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-2019-1333 - Priority: Urgent - CVSS: 7.5 (Critical) - EPSS: 0.1598 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Vendor exploitability assessment: Exploitation More Likely - Published: Oct 9, 2019 - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2019-1333 ## Description

A remote code execution vulnerability exists in the Windows Remote Desktop Client when a user connects to a malicious server. An attacker who successfully exploited this vulnerability could execute arbitrary code on the computer of the connecting client. 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 need to have control of a server and then convince a user to connect to it. An attacker would have no way of forcing a user to connect to the malicious server, they would need to trick the user into connecting via social engineering, DNS poisoning or using a Man in the Middle (MITM) technique. An attacker could also compromise a legitimate server, host malicious code on it, and wait for the user to connect.

The update addresses the vulnerability by correcting how the Windows Remote Desktop Client handles connection requests.

## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Microsoft | Windows 10 Version 1607 for 32-bit Systems | 14393.3274 | [KB4519998](https://patchblox.com/security/data/fix/microsoft/kb4519998.md) | Oct 8, 2019 | | Microsoft | Windows 10 Version 1607 for x64-based Systems | 14393.3274 | [KB4519998](https://patchblox.com/security/data/fix/microsoft/kb4519998.md) | Oct 8, 2019 | | Microsoft | Windows 10 Version 1703 for 32-bit Systems | 15063.2108 | [KB4520010](https://patchblox.com/security/data/fix/microsoft/kb4520010.md) | Oct 8, 2019 | | Microsoft | Windows 10 Version 1703 for x64-based Systems | 15063.2108 | [KB4520010](https://patchblox.com/security/data/fix/microsoft/kb4520010.md) | Oct 8, 2019 | | Microsoft | Windows 10 Version 1709 for 32-bit Systems | 16299.1451 | [KB4520004](https://patchblox.com/security/data/fix/microsoft/kb4520004.md) | Oct 8, 2019 | | Microsoft | Windows 10 Version 1709 for ARM64-based Systems | 16299.1451 | [KB4520004](https://patchblox.com/security/data/fix/microsoft/kb4520004.md) | Oct 8, 2019 | | Microsoft | Windows 10 Version 1709 for x64-based Systems | 16299.1451 | [KB4520004](https://patchblox.com/security/data/fix/microsoft/kb4520004.md) | Oct 8, 2019 | | Microsoft | Windows 10 Version 1803 for 32-bit Systems | 17134.1069 | [KB4520008](https://patchblox.com/security/data/fix/microsoft/kb4520008.md) | Oct 8, 2019 | | Microsoft | Windows 10 Version 1803 for ARM64-based Systems | 17134.1069 | [KB4520008](https://patchblox.com/security/data/fix/microsoft/kb4520008.md) | Oct 8, 2019 | | Microsoft | Windows 10 Version 1803 for x64-based Systems | 17134.1069 | [KB4520008](https://patchblox.com/security/data/fix/microsoft/kb4520008.md) | Oct 8, 2019 | | Microsoft | Windows 10 Version 1809 for 32-bit Systems | 17763.805 | [KB4519338](https://patchblox.com/security/data/fix/microsoft/kb4519338.md) | Oct 8, 2019 | | Microsoft | Windows 10 Version 1809 for ARM64-based Systems | 17763.805 | [KB4519338](https://patchblox.com/security/data/fix/microsoft/kb4519338.md) | Oct 8, 2019 | | Microsoft | Windows 10 Version 1809 for x64-based Systems | 17763.805 | [KB4519338](https://patchblox.com/security/data/fix/microsoft/kb4519338.md) | Oct 8, 2019 | | Microsoft | Windows 10 Version 1903 for 32-bit Systems | 18362.418 | [KB4517389](https://patchblox.com/security/data/fix/microsoft/kb4517389.md) | Oct 8, 2019 | | Microsoft | Windows 10 Version 1903 for ARM64-based Systems | 18362.418 | [KB4517389](https://patchblox.com/security/data/fix/microsoft/kb4517389.md) | Oct 8, 2019 | | Microsoft | Windows 10 Version 1903 for x64-based Systems | 18362.418 | [KB4517389](https://patchblox.com/security/data/fix/microsoft/kb4517389.md) | Oct 8, 2019 | | Microsoft | Windows 10 for 32-bit Systems | 10240.18368 | [KB4520011](https://patchblox.com/security/data/fix/microsoft/kb4520011.md) | Oct 8, 2019 | | Microsoft | Windows 10 for x64-based Systems | 10240.18368 | [KB4520011](https://patchblox.com/security/data/fix/microsoft/kb4520011.md) | Oct 8, 2019 | | Microsoft | Windows 7 for 32-bit Systems Service Pack 1 | | [KB4519976](https://patchblox.com/security/data/fix/microsoft/kb4519976.md) | Oct 8, 2019 | | Microsoft | Windows 7 for 32-bit Systems Service Pack 1 | | [KB4520003](https://patchblox.com/security/data/fix/microsoft/kb4520003.md) | Oct 8, 2019 | | Microsoft | Windows 7 for x64-based Systems Service Pack 1 | | [KB4519976](https://patchblox.com/security/data/fix/microsoft/kb4519976.md) | Oct 8, 2019 | | Microsoft | Windows 7 for x64-based Systems Service Pack 1 | | [KB4520003](https://patchblox.com/security/data/fix/microsoft/kb4520003.md) | Oct 8, 2019 | | Microsoft | Windows 8.1 for 32-bit systems | | [KB4520005](https://patchblox.com/security/data/fix/microsoft/kb4520005.md) | Oct 8, 2019 | | Microsoft | Windows 8.1 for 32-bit systems | | [KB4519990](https://patchblox.com/security/data/fix/microsoft/kb4519990.md) | Oct 8, 2019 | | Microsoft | Windows 8.1 for x64-based systems | | [KB4520005](https://patchblox.com/security/data/fix/microsoft/kb4520005.md) | Oct 8, 2019 | | Microsoft | Windows 8.1 for x64-based systems | | [KB4519990](https://patchblox.com/security/data/fix/microsoft/kb4519990.md) | Oct 8, 2019 | | Microsoft | Windows RT 8.1 | | [KB4520005](https://patchblox.com/security/data/fix/microsoft/kb4520005.md) | Oct 8, 2019 | | Microsoft | Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 | | [KB4519976](https://patchblox.com/security/data/fix/microsoft/kb4519976.md) | Oct 8, 2019 | | Microsoft | Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 | | [KB4520003](https://patchblox.com/security/data/fix/microsoft/kb4520003.md) | Oct 8, 2019 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 | | [KB4519976](https://patchblox.com/security/data/fix/microsoft/kb4519976.md) | Oct 8, 2019 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 | | [KB4520003](https://patchblox.com/security/data/fix/microsoft/kb4520003.md) | Oct 8, 2019 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | | [KB4519976](https://patchblox.com/security/data/fix/microsoft/kb4519976.md) | Oct 8, 2019 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | | [KB4520003](https://patchblox.com/security/data/fix/microsoft/kb4520003.md) | Oct 8, 2019 | | Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 | | [KB4520002](https://patchblox.com/security/data/fix/microsoft/kb4520002.md) | Oct 8, 2019 | | Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 | | [KB4520009](https://patchblox.com/security/data/fix/microsoft/kb4520009.md) | Oct 8, 2019 | | Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) | | [KB4520002](https://patchblox.com/security/data/fix/microsoft/kb4520002.md) | Oct 8, 2019 | | Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) | | [KB4520009](https://patchblox.com/security/data/fix/microsoft/kb4520009.md) | Oct 8, 2019 | | Microsoft | Windows Server 2008 for Itanium-Based Systems Service Pack 2 | | [KB4520002](https://patchblox.com/security/data/fix/microsoft/kb4520002.md) | Oct 8, 2019 | | Microsoft | Windows Server 2008 for Itanium-Based Systems Service Pack 2 | | [KB4520009](https://patchblox.com/security/data/fix/microsoft/kb4520009.md) | Oct 8, 2019 | | Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 | | [KB4520002](https://patchblox.com/security/data/fix/microsoft/kb4520002.md) | Oct 8, 2019 | | Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 | | [KB4520009](https://patchblox.com/security/data/fix/microsoft/kb4520009.md) | Oct 8, 2019 | | Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) | | [KB4520002](https://patchblox.com/security/data/fix/microsoft/kb4520002.md) | Oct 8, 2019 | | Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) | | [KB4520009](https://patchblox.com/security/data/fix/microsoft/kb4520009.md) | Oct 8, 2019 | | Microsoft | Windows Server 2012 | | [KB4520007](https://patchblox.com/security/data/fix/microsoft/kb4520007.md) | Oct 8, 2019 | | Microsoft | Windows Server 2012 | | [KB4519985](https://patchblox.com/security/data/fix/microsoft/kb4519985.md) | Oct 8, 2019 | | Microsoft | Windows Server 2012 (Server Core installation) | | [KB4520007](https://patchblox.com/security/data/fix/microsoft/kb4520007.md) | Oct 8, 2019 | | Microsoft | Windows Server 2012 (Server Core installation) | | [KB4519985](https://patchblox.com/security/data/fix/microsoft/kb4519985.md) | Oct 8, 2019 | | Microsoft | Windows Server 2012 R2 | | [KB4520005](https://patchblox.com/security/data/fix/microsoft/kb4520005.md) | Oct 8, 2019 | | Microsoft | Windows Server 2012 R2 | | [KB4519990](https://patchblox.com/security/data/fix/microsoft/kb4519990.md) | Oct 8, 2019 | | Microsoft | Windows Server 2012 R2 (Server Core installation) | | [KB4520005](https://patchblox.com/security/data/fix/microsoft/kb4520005.md) | Oct 8, 2019 | | Microsoft | Windows Server 2012 R2 (Server Core installation) | | [KB4519990](https://patchblox.com/security/data/fix/microsoft/kb4519990.md) | Oct 8, 2019 | | Microsoft | Windows Server 2016 | 14393.3274 | [KB4519998](https://patchblox.com/security/data/fix/microsoft/kb4519998.md) | Oct 8, 2019 | | Microsoft | Windows Server 2016 (Server Core installation) | 14393.3274 | [KB4519998](https://patchblox.com/security/data/fix/microsoft/kb4519998.md) | Oct 8, 2019 | | Microsoft | Windows Server 2019 | 17763.805 | [KB4519338](https://patchblox.com/security/data/fix/microsoft/kb4519338.md) | Oct 8, 2019 | | Microsoft | Windows Server 2019 (Server Core installation) | 17763.805 | [KB4519338](https://patchblox.com/security/data/fix/microsoft/kb4519338.md) | Oct 8, 2019 | | Microsoft | Windows Server, version 1803 (Server Core Installation) | 17134.1069 | [KB4520008](https://patchblox.com/security/data/fix/microsoft/kb4520008.md) | Oct 8, 2019 | | Microsoft | Windows Server, version 1903 (Server Core installation) | 18362.418 | [KB4517389](https://patchblox.com/security/data/fix/microsoft/kb4517389.md) | Oct 8, 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.