# CVE-2018-8393: Microsoft JET Database Engine Remote Code Execution Vulnerability CVE-2018-8393 is fixed in 31 products on 1 platform, first by KB4457131, released September 11, 2018. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2018-8393 - Priority: High - CVSS: 7.8 (Important) - EPSS: 0.2248 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Vendor exploitability assessment: Exploitation Less Likely - Published: Sep 11, 2018 - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2018-8393 ## Description

A buffer overflow vulnerability exists in the Microsoft JET Database Engine that could allow remote code execution on an affected system. An attacker who successfully exploited this vulnerability could take control of an 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.

To exploit the vulnerability, a user must open a specially crafted Excel file while using an affected version of Microsoft Windows. In an email attack scenario, an attacker could exploit the vulnerability by sending a specially crafted Excel file to the user, and then convincing the user to open the file.

The security update addresses the vulnerability by modifying how the Microsoft JET Database Engine handles objects in memory.

## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Microsoft | Windows 10 Version 1607 for 32-bit Systems | 14393.2485 | [KB4457131](https://patchblox.com/security/data/fix/microsoft/kb4457131.md) | Sep 11, 2018 | | Microsoft | Windows 10 Version 1607 for x64-based Systems | 14393.2485 | [KB4457131](https://patchblox.com/security/data/fix/microsoft/kb4457131.md) | Sep 11, 2018 | | Microsoft | Windows 10 Version 1703 for 32-bit Systems | 15063.1324 | [KB4457138](https://patchblox.com/security/data/fix/microsoft/kb4457138.md) | Sep 11, 2018 | | Microsoft | Windows 10 Version 1703 for x64-based Systems | 15063.1324 | [KB4457138](https://patchblox.com/security/data/fix/microsoft/kb4457138.md) | Sep 11, 2018 | | Microsoft | Windows 10 Version 1709 for 32-bit Systems | 16299.665 | [KB4457142](https://patchblox.com/security/data/fix/microsoft/kb4457142.md) | Sep 11, 2018 | | Microsoft | Windows 10 Version 1709 for x64-based Systems | 16299.665 | [KB4457142](https://patchblox.com/security/data/fix/microsoft/kb4457142.md) | Sep 11, 2018 | | Microsoft | Windows 10 Version 1803 for 32-bit Systems | 17134.285 | [KB4457128](https://patchblox.com/security/data/fix/microsoft/kb4457128.md) | Sep 11, 2018 | | Microsoft | Windows 10 Version 1803 for x64-based Systems | 17134.285 | [KB4457128](https://patchblox.com/security/data/fix/microsoft/kb4457128.md) | Sep 11, 2018 | | Microsoft | Windows 10 for 32-bit Systems | 10240.17976 | [KB4457132](https://patchblox.com/security/data/fix/microsoft/kb4457132.md) | Sep 11, 2018 | | Microsoft | Windows 10 for x64-based Systems | 10240.17976 | [KB4457132](https://patchblox.com/security/data/fix/microsoft/kb4457132.md) | Sep 11, 2018 | | Microsoft | Windows 7 for 32-bit Systems Service Pack 1 | | [KB4457144](https://patchblox.com/security/data/fix/microsoft/kb4457144.md) | Sep 11, 2018 | | Microsoft | Windows 7 for 32-bit Systems Service Pack 1 | | [KB4457145](https://patchblox.com/security/data/fix/microsoft/kb4457145.md) | Sep 11, 2018 | | Microsoft | Windows 7 for x64-based Systems Service Pack 1 | | [KB4457144](https://patchblox.com/security/data/fix/microsoft/kb4457144.md) | Sep 11, 2018 | | Microsoft | Windows 7 for x64-based Systems Service Pack 1 | | [KB4457145](https://patchblox.com/security/data/fix/microsoft/kb4457145.md) | Sep 11, 2018 | | Microsoft | Windows 8.1 for 32-bit systems | | [KB4457129](https://patchblox.com/security/data/fix/microsoft/kb4457129.md) | Sep 11, 2018 | | Microsoft | Windows 8.1 for 32-bit systems | | [KB4457143](https://patchblox.com/security/data/fix/microsoft/kb4457143.md) | Sep 11, 2018 | | Microsoft | Windows 8.1 for x64-based systems | | [KB4457129](https://patchblox.com/security/data/fix/microsoft/kb4457129.md) | Sep 11, 2018 | | Microsoft | Windows 8.1 for x64-based systems | | [KB4457143](https://patchblox.com/security/data/fix/microsoft/kb4457143.md) | Sep 11, 2018 | | Microsoft | Windows RT 8.1 | | [KB4457129](https://patchblox.com/security/data/fix/microsoft/kb4457129.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 | | [KB4457144](https://patchblox.com/security/data/fix/microsoft/kb4457144.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 | | [KB4457145](https://patchblox.com/security/data/fix/microsoft/kb4457145.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 | | [KB4457144](https://patchblox.com/security/data/fix/microsoft/kb4457144.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 | | [KB4457145](https://patchblox.com/security/data/fix/microsoft/kb4457145.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | | [KB4457144](https://patchblox.com/security/data/fix/microsoft/kb4457144.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | | [KB4457145](https://patchblox.com/security/data/fix/microsoft/kb4457145.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 | | [KB4457984](https://patchblox.com/security/data/fix/microsoft/kb4457984.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 | | [KB4458010](https://patchblox.com/security/data/fix/microsoft/kb4458010.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) | | [KB4457984](https://patchblox.com/security/data/fix/microsoft/kb4457984.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) | | [KB4458010](https://patchblox.com/security/data/fix/microsoft/kb4458010.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 for Itanium-Based Systems Service Pack 2 | | [KB4457984](https://patchblox.com/security/data/fix/microsoft/kb4457984.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 for Itanium-Based Systems Service Pack 2 | | [KB4458010](https://patchblox.com/security/data/fix/microsoft/kb4458010.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 | | [KB4457984](https://patchblox.com/security/data/fix/microsoft/kb4457984.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 | | [KB4458010](https://patchblox.com/security/data/fix/microsoft/kb4458010.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) | | [KB4457984](https://patchblox.com/security/data/fix/microsoft/kb4457984.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) | | [KB4458010](https://patchblox.com/security/data/fix/microsoft/kb4458010.md) | Sep 11, 2018 | | Microsoft | Windows Server 2012 | | [KB4457135](https://patchblox.com/security/data/fix/microsoft/kb4457135.md) | Sep 11, 2018 | | Microsoft | Windows Server 2012 | | [KB4457140](https://patchblox.com/security/data/fix/microsoft/kb4457140.md) | Sep 11, 2018 | | Microsoft | Windows Server 2012 (Server Core installation) | | [KB4457135](https://patchblox.com/security/data/fix/microsoft/kb4457135.md) | Sep 11, 2018 | | Microsoft | Windows Server 2012 (Server Core installation) | | [KB4457140](https://patchblox.com/security/data/fix/microsoft/kb4457140.md) | Sep 11, 2018 | | Microsoft | Windows Server 2012 R2 | | [KB4457129](https://patchblox.com/security/data/fix/microsoft/kb4457129.md) | Sep 11, 2018 | | Microsoft | Windows Server 2012 R2 | | [KB4457143](https://patchblox.com/security/data/fix/microsoft/kb4457143.md) | Sep 11, 2018 | | Microsoft | Windows Server 2012 R2 (Server Core installation) | | [KB4457129](https://patchblox.com/security/data/fix/microsoft/kb4457129.md) | Sep 11, 2018 | | Microsoft | Windows Server 2012 R2 (Server Core installation) | | [KB4457143](https://patchblox.com/security/data/fix/microsoft/kb4457143.md) | Sep 11, 2018 | | Microsoft | Windows Server 2016 | 14393.2485 | [KB4457131](https://patchblox.com/security/data/fix/microsoft/kb4457131.md) | Sep 11, 2018 | | Microsoft | Windows Server 2016 (Server Core installation) | 14393.2485 | [KB4457131](https://patchblox.com/security/data/fix/microsoft/kb4457131.md) | Sep 11, 2018 | | Microsoft | Windows Server, version 1709 (Server Core Installation) | 16299.665 | [KB4457142](https://patchblox.com/security/data/fix/microsoft/kb4457142.md) | Sep 11, 2018 | | Microsoft | Windows Server, version 1803 (Server Core Installation) | 17134.285 | [KB4457128](https://patchblox.com/security/data/fix/microsoft/kb4457128.md) | Sep 11, 2018 | --- Data as of 2026-11-07T18:46:35Z UTC. 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