# CVE-2019-0845: Windows IOleCvt Interface Remote Code Execution Vulnerability CVE-2019-0845 is fixed in 38 products on 1 platform, first by KB4493470, released April 9, 2019. It is not reported as exploited. Patch Radar priority: Urgent. - Web page: https://patchblox.com/security/cve/CVE-2019-0845 - Priority: Urgent - CVSS: 7.5 (Critical) - EPSS: 0.1481 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Vendor exploitability assessment: Exploitation Less Likely - Published: Apr 9, 2019 - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2019-0845 ## Description

A remote code execution vulnerability exists when the IOleCvt interface renders ASP webpage content. An attacker who successfully exploited the vulnerability could run malicious code remotely to take control of the user’s system.

In a web-based attack scenario, an attacker could host a specially crafted website designed to exploit the vulnerability through Microsoft browsers and then convince a user to view the website. An attacker could also embed an ActiveX control marked "safe for initialization" in an application or Microsoft Office document that hosts the browser rendering engine. The attacker could also take advantage of compromised websites and websites that accept or host user-provided content or advertisements. These websites could contain specially crafted content that could exploit the vulnerability.

The update addresses the vulnerability by correcting methods exposed when the IOleCvt interface is invoked.

## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Microsoft | Windows 10 Version 1607 for 32-bit Systems | 14393.2906 | [KB4493470](https://patchblox.com/security/data/fix/microsoft/kb4493470.md) | Apr 9, 2019 | | Microsoft | Windows 10 Version 1607 for x64-based Systems | 14393.2906 | [KB4493470](https://patchblox.com/security/data/fix/microsoft/kb4493470.md) | Apr 9, 2019 | | Microsoft | Windows 10 Version 1703 for 32-bit Systems | 15063.1746 | [KB4493474](https://patchblox.com/security/data/fix/microsoft/kb4493474.md) | Apr 9, 2019 | | Microsoft | Windows 10 Version 1703 for x64-based Systems | 15063.1746 | [KB4493474](https://patchblox.com/security/data/fix/microsoft/kb4493474.md) | Apr 9, 2019 | | Microsoft | Windows 10 Version 1709 for 32-bit Systems | 16299.1087 | [KB4493441](https://patchblox.com/security/data/fix/microsoft/kb4493441.md) | Apr 9, 2019 | | Microsoft | Windows 10 Version 1709 for ARM64-based Systems | 16299.1087 | [KB4493441](https://patchblox.com/security/data/fix/microsoft/kb4493441.md) | Apr 9, 2019 | | Microsoft | Windows 10 Version 1709 for x64-based Systems | 16299.1087 | [KB4493441](https://patchblox.com/security/data/fix/microsoft/kb4493441.md) | Apr 9, 2019 | | Microsoft | Windows 10 Version 1803 for 32-bit Systems | 17134.706 | [KB4493464](https://patchblox.com/security/data/fix/microsoft/kb4493464.md) | Apr 9, 2019 | | Microsoft | Windows 10 Version 1803 for ARM64-based Systems | 17134.706 | [KB4493464](https://patchblox.com/security/data/fix/microsoft/kb4493464.md) | Apr 9, 2019 | | Microsoft | Windows 10 Version 1803 for x64-based Systems | 17134.706 | [KB4493464](https://patchblox.com/security/data/fix/microsoft/kb4493464.md) | Apr 9, 2019 | | Microsoft | Windows 10 Version 1809 for 32-bit Systems | 17763.437 | [KB4493509](https://patchblox.com/security/data/fix/microsoft/kb4493509.md) | Apr 9, 2019 | | Microsoft | Windows 10 Version 1809 for ARM64-based Systems | 17763.437 | [KB4493509](https://patchblox.com/security/data/fix/microsoft/kb4493509.md) | Apr 9, 2019 | | Microsoft | Windows 10 Version 1809 for x64-based Systems | 17763.437 | [KB4493509](https://patchblox.com/security/data/fix/microsoft/kb4493509.md) | Apr 9, 2019 | | Microsoft | Windows 10 for 32-bit Systems | 10240.18186 | [KB4493475](https://patchblox.com/security/data/fix/microsoft/kb4493475.md) | Apr 9, 2019 | | Microsoft | Windows 10 for x64-based Systems | 10240.18186 | [KB4493475](https://patchblox.com/security/data/fix/microsoft/kb4493475.md) | Apr 9, 2019 | | Microsoft | Windows 7 for 32-bit Systems Service Pack 1 | | [KB4493448](https://patchblox.com/security/data/fix/microsoft/kb4493448.md) | Apr 9, 2019 | | Microsoft | Windows 7 for 32-bit Systems Service Pack 1 | | [KB4493472](https://patchblox.com/security/data/fix/microsoft/kb4493472.md) | Apr 9, 2019 | | Microsoft | Windows 7 for x64-based Systems Service Pack 1 | | [KB4493448](https://patchblox.com/security/data/fix/microsoft/kb4493448.md) | Apr 9, 2019 | | Microsoft | Windows 7 for x64-based Systems Service Pack 1 | | [KB4493472](https://patchblox.com/security/data/fix/microsoft/kb4493472.md) | Apr 9, 2019 | | Microsoft | Windows 8.1 for 32-bit systems | | [KB4493467](https://patchblox.com/security/data/fix/microsoft/kb4493467.md) | Apr 9, 2019 | | Microsoft | Windows 8.1 for 32-bit systems | | [KB4493446](https://patchblox.com/security/data/fix/microsoft/kb4493446.md) | Apr 9, 2019 | | Microsoft | Windows 8.1 for x64-based systems | | [KB4493467](https://patchblox.com/security/data/fix/microsoft/kb4493467.md) | Apr 9, 2019 | | Microsoft | Windows 8.1 for x64-based systems | | [KB4493446](https://patchblox.com/security/data/fix/microsoft/kb4493446.md) | Apr 9, 2019 | | Microsoft | Windows RT 8.1 | | [KB4493446](https://patchblox.com/security/data/fix/microsoft/kb4493446.md) | Apr 9, 2019 | | Microsoft | Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 | | [KB4493448](https://patchblox.com/security/data/fix/microsoft/kb4493448.md) | Apr 9, 2019 | | Microsoft | Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 | | [KB4493472](https://patchblox.com/security/data/fix/microsoft/kb4493472.md) | Apr 9, 2019 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 | | [KB4493448](https://patchblox.com/security/data/fix/microsoft/kb4493448.md) | Apr 9, 2019 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 | | [KB4493472](https://patchblox.com/security/data/fix/microsoft/kb4493472.md) | Apr 9, 2019 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | | [KB4493448](https://patchblox.com/security/data/fix/microsoft/kb4493448.md) | Apr 9, 2019 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | | [KB4493472](https://patchblox.com/security/data/fix/microsoft/kb4493472.md) | Apr 9, 2019 | | Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 | | [KB4493471](https://patchblox.com/security/data/fix/microsoft/kb4493471.md) | Apr 9, 2019 | | Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 | | [KB4493458](https://patchblox.com/security/data/fix/microsoft/kb4493458.md) | Apr 9, 2019 | | Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) | | [KB4493471](https://patchblox.com/security/data/fix/microsoft/kb4493471.md) | Apr 9, 2019 | | Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) | | [KB4493458](https://patchblox.com/security/data/fix/microsoft/kb4493458.md) | Apr 9, 2019 | | Microsoft | Windows Server 2008 for Itanium-Based Systems Service Pack 2 | | [KB4493471](https://patchblox.com/security/data/fix/microsoft/kb4493471.md) | Apr 9, 2019 | | Microsoft | Windows Server 2008 for Itanium-Based Systems Service Pack 2 | | [KB4493458](https://patchblox.com/security/data/fix/microsoft/kb4493458.md) | Apr 9, 2019 | | Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 | | [KB4493471](https://patchblox.com/security/data/fix/microsoft/kb4493471.md) | Apr 9, 2019 | | Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 | | [KB4493458](https://patchblox.com/security/data/fix/microsoft/kb4493458.md) | Apr 9, 2019 | | Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) | | [KB4493471](https://patchblox.com/security/data/fix/microsoft/kb4493471.md) | Apr 9, 2019 | | Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) | | [KB4493458](https://patchblox.com/security/data/fix/microsoft/kb4493458.md) | Apr 9, 2019 | | Microsoft | Windows Server 2012 | | [KB4493451](https://patchblox.com/security/data/fix/microsoft/kb4493451.md) | Apr 9, 2019 | | Microsoft | Windows Server 2012 | | [KB4493450](https://patchblox.com/security/data/fix/microsoft/kb4493450.md) | Apr 9, 2019 | | Microsoft | Windows Server 2012 (Server Core installation) | | [KB4493451](https://patchblox.com/security/data/fix/microsoft/kb4493451.md) | Apr 9, 2019 | | Microsoft | Windows Server 2012 (Server Core installation) | | [KB4493450](https://patchblox.com/security/data/fix/microsoft/kb4493450.md) | Apr 9, 2019 | | Microsoft | Windows Server 2012 R2 | | [KB4493467](https://patchblox.com/security/data/fix/microsoft/kb4493467.md) | Apr 9, 2019 | | Microsoft | Windows Server 2012 R2 | | [KB4493446](https://patchblox.com/security/data/fix/microsoft/kb4493446.md) | Apr 9, 2019 | | Microsoft | Windows Server 2012 R2 (Server Core installation) | | [KB4493467](https://patchblox.com/security/data/fix/microsoft/kb4493467.md) | Apr 9, 2019 | | Microsoft | Windows Server 2012 R2 (Server Core installation) | | [KB4493446](https://patchblox.com/security/data/fix/microsoft/kb4493446.md) | Apr 9, 2019 | | Microsoft | Windows Server 2016 | 14393.2906 | [KB4493470](https://patchblox.com/security/data/fix/microsoft/kb4493470.md) | Apr 9, 2019 | | Microsoft | Windows Server 2016 (Server Core installation) | 14393.2906 | [KB4493470](https://patchblox.com/security/data/fix/microsoft/kb4493470.md) | Apr 9, 2019 | | Microsoft | Windows Server 2019 | 17763.437 | [KB4493509](https://patchblox.com/security/data/fix/microsoft/kb4493509.md) | Apr 9, 2019 | | Microsoft | Windows Server 2019 (Server Core installation) | 17763.437 | [KB4493509](https://patchblox.com/security/data/fix/microsoft/kb4493509.md) | Apr 9, 2019 | | Microsoft | Windows Server, version 1709 (Server Core Installation) | 16299.1087 | [KB4493441](https://patchblox.com/security/data/fix/microsoft/kb4493441.md) | Apr 9, 2019 | | Microsoft | Windows Server, version 1803 (Server Core Installation) | 17134.706 | [KB4493464](https://patchblox.com/security/data/fix/microsoft/kb4493464.md) | Apr 9, 2019 | --- 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 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.