A remote code execution vulnerability exists in the way that the Color Management Module (ICM32.dll) handles objects in memory. An attacker who successfully exploited this vulnerability could take control of the affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.
In a web-based attack scenario, an attacker could host a specially crafted website that is designed to exploit the vulnerability and then convince users to view the website. An attacker would have no way to force users to view the attacker-controlled content. Instead, an attacker would have to convince users to take action, typically by getting them to click a link in an email or Instant Messenger message that takes users to the attacker's website, or by opening an attachment sent through email.
The security update addresses the vulnerability by correcting how Color Management Module handles objects in memory.
## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Microsoft | Windows 10 Version 1607 for 32-bit Systems | 14393.3686 | [KB4556813](https://patchblox.com/security/data/fix/microsoft/kb4556813.md) | May 12, 2020 | | Microsoft | Windows 10 Version 1607 for x64-based Systems | 14393.3686 | [KB4556813](https://patchblox.com/security/data/fix/microsoft/kb4556813.md) | May 12, 2020 | | Microsoft | Windows 10 Version 1709 for 32-bit Systems | 16299.1868 | [KB4556812](https://patchblox.com/security/data/fix/microsoft/kb4556812.md) | May 12, 2020 | | Microsoft | Windows 10 Version 1709 for ARM64-based Systems | 16299.1868 | [KB4556812](https://patchblox.com/security/data/fix/microsoft/kb4556812.md) | May 12, 2020 | | Microsoft | Windows 10 Version 1709 for x64-based Systems | 16299.1868 | [KB4556812](https://patchblox.com/security/data/fix/microsoft/kb4556812.md) | May 12, 2020 | | Microsoft | Windows 10 Version 1803 for 32-bit Systems | 17134.1488 | [KB4556807](https://patchblox.com/security/data/fix/microsoft/kb4556807.md) | May 12, 2020 | | Microsoft | Windows 10 Version 1803 for ARM64-based Systems | 17134.1488 | [KB4556807](https://patchblox.com/security/data/fix/microsoft/kb4556807.md) | May 12, 2020 | | Microsoft | Windows 10 Version 1803 for x64-based Systems | 17134.1488 | [KB4556807](https://patchblox.com/security/data/fix/microsoft/kb4556807.md) | May 12, 2020 | | 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 2016 | 14393.3686 | [KB4556813](https://patchblox.com/security/data/fix/microsoft/kb4556813.md) | May 12, 2020 | | Microsoft | Windows Server 2016 (Server Core installation) | 14393.3686 | [KB4556813](https://patchblox.com/security/data/fix/microsoft/kb4556813.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 1803 (Server Core Installation) | 17134.1488 | [KB4556807](https://patchblox.com/security/data/fix/microsoft/kb4556807.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 2026-11-08T06:59:42Z 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.