# CVE-2018-8260: .NET Framework Remote Code Execution Vulnerability CVE-2018-8260 is fixed in 23 products on 1 platform, first by KB4338814, released July 10, 2018. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2018-8260 - Priority: High - CVSS: n/a (Important) - EPSS: 0.1595 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Vendor exploitability assessment: Exploitation Unlikely - Published: Jul 10, 2018 - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2018-8260 ## Description

A remote code execution vulnerability exists in .NET software when the software fails to check the source markup of a file.

An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the current user. If the current user is logged on with administrative user rights, an attacker 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.

Exploitation of the vulnerability requires that a user open a specially crafted file with an affected version of .NET Framework. In an email attack scenario, an attacker could exploit the vulnerability by sending the specially crafted file to the user and convincing the user to open the file.

The security update addresses the vulnerability by correcting how .NET Framework checks the source markup of a file.

## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Microsoft | Microsoft .NET Framework 4.7.2 on Windows 10 Version 1607 for 32-bit Systems | 14393.2368 | [KB4345418](https://patchblox.com/security/data/fix/microsoft/kb4345418.md) | Jul 16, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows 10 Version 1607 for 32-bit Systems | 14393.2363 | [KB4338814](https://patchblox.com/security/data/fix/microsoft/kb4338814.md) | Jul 10, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows 10 Version 1607 for x64-based Systems | 14393.2368 | [KB4345418](https://patchblox.com/security/data/fix/microsoft/kb4345418.md) | Jul 16, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows 10 Version 1607 for x64-based Systems | 14393.2363 | [KB4338814](https://patchblox.com/security/data/fix/microsoft/kb4338814.md) | Jul 10, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows 10 Version 1703 for 32-bit Systems | 15063.1209 | [KB4345419](https://patchblox.com/security/data/fix/microsoft/kb4345419.md) | Jul 16, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows 10 Version 1703 for 32-bit Systems | 15063.1206 | [KB4338826](https://patchblox.com/security/data/fix/microsoft/kb4338826.md) | Jul 10, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows 10 Version 1703 for x64-based Systems | 15063.1209 | [KB4345419](https://patchblox.com/security/data/fix/microsoft/kb4345419.md) | Jul 16, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows 10 Version 1703 for x64-based Systems | 15063.1206 | [KB4338826](https://patchblox.com/security/data/fix/microsoft/kb4338826.md) | Jul 10, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows 10 Version 1709 for 32-bit Systems | 16299.551 | [KB4345420](https://patchblox.com/security/data/fix/microsoft/kb4345420.md) | Jul 16, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows 10 Version 1709 for 32-bit Systems | 16299.547 | [KB4338825](https://patchblox.com/security/data/fix/microsoft/kb4338825.md) | Jul 10, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows 10 Version 1709 for x64-based Systems | 16299.551 | [KB4345420](https://patchblox.com/security/data/fix/microsoft/kb4345420.md) | Jul 16, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows 10 Version 1709 for x64-based Systems | 16299.547 | [KB4338825](https://patchblox.com/security/data/fix/microsoft/kb4338825.md) | Jul 10, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows 10 Version 1803 for 32-bit Systems | 17134.167 | [KB4345421](https://patchblox.com/security/data/fix/microsoft/kb4345421.md) | Jul 16, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows 10 Version 1803 for 32-bit Systems | 17134.165 | [KB4338819](https://patchblox.com/security/data/fix/microsoft/kb4338819.md) | Jul 10, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows 10 Version 1803 for x64-based Systems | 17134.167 | [KB4345421](https://patchblox.com/security/data/fix/microsoft/kb4345421.md) | Jul 16, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows 10 Version 1803 for x64-based Systems | 17134.165 | [KB4338819](https://patchblox.com/security/data/fix/microsoft/kb4338819.md) | Jul 10, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows 7 for 32-bit Systems Service Pack 1 | | [KB4338420](https://patchblox.com/security/data/fix/microsoft/kb4338420.md) | Jul 10, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows 7 for 32-bit Systems Service Pack 1 | | [KB4338606](https://patchblox.com/security/data/fix/microsoft/kb4338606.md) | Jul 10, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows 7 for x64-based Systems Service Pack 1 | | [KB4338420](https://patchblox.com/security/data/fix/microsoft/kb4338420.md) | Jul 10, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows 7 for x64-based Systems Service Pack 1 | | [KB4338606](https://patchblox.com/security/data/fix/microsoft/kb4338606.md) | Jul 10, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows 8.1 for 32-bit systems | | [KB4338419](https://patchblox.com/security/data/fix/microsoft/kb4338419.md) | Jul 10, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows 8.1 for 32-bit systems | | [KB4338605](https://patchblox.com/security/data/fix/microsoft/kb4338605.md) | Jul 10, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows 8.1 for x64-based systems | | [KB4338419](https://patchblox.com/security/data/fix/microsoft/kb4338419.md) | Jul 10, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows 8.1 for x64-based systems | | [KB4338605](https://patchblox.com/security/data/fix/microsoft/kb4338605.md) | Jul 10, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows RT 8.1 | | [KB4338419](https://patchblox.com/security/data/fix/microsoft/kb4338419.md) | Jul 10, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 | | [KB4338420](https://patchblox.com/security/data/fix/microsoft/kb4338420.md) | Jul 10, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 | | [KB4338606](https://patchblox.com/security/data/fix/microsoft/kb4338606.md) | Jul 10, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | | [KB4338420](https://patchblox.com/security/data/fix/microsoft/kb4338420.md) | Jul 10, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | | [KB4338606](https://patchblox.com/security/data/fix/microsoft/kb4338606.md) | Jul 10, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows Server 2012 | | [KB4338604](https://patchblox.com/security/data/fix/microsoft/kb4338604.md) | Jul 10, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows Server 2012 | | [KB4338418](https://patchblox.com/security/data/fix/microsoft/kb4338418.md) | Jul 10, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows Server 2012 (Server Core installation) | | [KB4338604](https://patchblox.com/security/data/fix/microsoft/kb4338604.md) | Jul 10, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows Server 2012 (Server Core installation) | | [KB4338418](https://patchblox.com/security/data/fix/microsoft/kb4338418.md) | Jul 10, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows Server 2012 R2 | | [KB4338419](https://patchblox.com/security/data/fix/microsoft/kb4338419.md) | Jul 10, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows Server 2012 R2 | | [KB4338605](https://patchblox.com/security/data/fix/microsoft/kb4338605.md) | Jul 10, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows Server 2012 R2 (Server Core installation) | | [KB4338419](https://patchblox.com/security/data/fix/microsoft/kb4338419.md) | Jul 10, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows Server 2012 R2 (Server Core installation) | | [KB4338605](https://patchblox.com/security/data/fix/microsoft/kb4338605.md) | Jul 10, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows Server 2016 | 14393.2368 | [KB4345418](https://patchblox.com/security/data/fix/microsoft/kb4345418.md) | Jul 16, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows Server 2016 | 14393.2363 | [KB4338814](https://patchblox.com/security/data/fix/microsoft/kb4338814.md) | Jul 10, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows Server 2016 (Server Core installation) | 14393.2363 | [KB4338814](https://patchblox.com/security/data/fix/microsoft/kb4338814.md) | Jul 10, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows Server, version 1709 (Server Core Installation) | 16299.551 | [KB4345420](https://patchblox.com/security/data/fix/microsoft/kb4345420.md) | Jul 16, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows Server, version 1709 (Server Core Installation) | 16299.547 | [KB4338825](https://patchblox.com/security/data/fix/microsoft/kb4338825.md) | Jul 10, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows Server, version 1803 (Server Core Installation) | 17134.167 | [KB4345421](https://patchblox.com/security/data/fix/microsoft/kb4345421.md) | Jul 16, 2018 | | Microsoft | Microsoft .NET Framework 4.7.2 on Windows Server, version 1803 (Server Core Installation) | 17134.165 | [KB4338819](https://patchblox.com/security/data/fix/microsoft/kb4338819.md) | Jul 10, 2018 | --- 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