# CVE-2023-36873: .NET Framework Spoofing Vulnerability

CVE-2023-36873 is fixed in 57 products on 1 platform, first by KB5029242, released August 8, 2023. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2023-36873
- Priority: High
- CVSS: 7.4 (Important)
- EPSS: 0.0150
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Aug 8, 2023
- Weakness: Improper Input Validation
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36873

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for 32-bit Systems | 14393.6167 | [KB5029242](https://patchblox.com/security/data/fix/microsoft/kb5029242.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for x64-based Systems | 14393.6167 | [KB5029242](https://patchblox.com/security/data/fix/microsoft/kb5029242.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016 | 14393.6167 | [KB5029242](https://patchblox.com/security/data/fix/microsoft/kb5029242.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016 (Server Core installation) | 14393.6167 | [KB5029242](https://patchblox.com/security/data/fix/microsoft/kb5029242.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for 32-bit Systems |  | [KB5029647](https://patchblox.com/security/data/fix/microsoft/kb5029647.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for ARM64-based Systems |  | [KB5029647](https://patchblox.com/security/data/fix/microsoft/kb5029647.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for x64-based Systems |  | [KB5029647](https://patchblox.com/security/data/fix/microsoft/kb5029647.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019 |  | [KB5029647](https://patchblox.com/security/data/fix/microsoft/kb5029647.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019 (Server Core installation) |  | [KB5029647](https://patchblox.com/security/data/fix/microsoft/kb5029647.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for 32-bit Systems |  | [KB5029647](https://patchblox.com/security/data/fix/microsoft/kb5029647.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for x64-based Systems |  | [KB5029647](https://patchblox.com/security/data/fix/microsoft/kb5029647.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 21H2 for 32-bit Systems |  | [KB5029648](https://patchblox.com/security/data/fix/microsoft/kb5029648.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 21H2 for ARM64-based Systems |  | [KB5029648](https://patchblox.com/security/data/fix/microsoft/kb5029648.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 21H2 for x64-based Systems |  | [KB5029648](https://patchblox.com/security/data/fix/microsoft/kb5029648.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 22H2 for 32-bit Systems |  | [KB5029649](https://patchblox.com/security/data/fix/microsoft/kb5029649.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 22H2 for ARM64-based Systems |  | [KB5029649](https://patchblox.com/security/data/fix/microsoft/kb5029649.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 22H2 for x64-based Systems |  | [KB5029649](https://patchblox.com/security/data/fix/microsoft/kb5029649.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.8 on Windows 11 version 21H2 for ARM64-based Systems |  | [KB5029650](https://patchblox.com/security/data/fix/microsoft/kb5029650.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.8 on Windows 11 version 21H2 for x64-based Systems |  | [KB5029650](https://patchblox.com/security/data/fix/microsoft/kb5029650.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019 |  | [KB5029647](https://patchblox.com/security/data/fix/microsoft/kb5029647.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019 (Server Core installation) |  | [KB5029647](https://patchblox.com/security/data/fix/microsoft/kb5029647.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2022 |  | [KB5029655](https://patchblox.com/security/data/fix/microsoft/kb5029655.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2022 (Server Core installation) |  | [KB5029655](https://patchblox.com/security/data/fix/microsoft/kb5029655.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 21H2 for 32-bit Systems |  | [KB5029648](https://patchblox.com/security/data/fix/microsoft/kb5029648.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 21H2 for ARM64-based Systems |  | [KB5029648](https://patchblox.com/security/data/fix/microsoft/kb5029648.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 21H2 for x64-based Systems |  | [KB5029648](https://patchblox.com/security/data/fix/microsoft/kb5029648.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 22H2 for 32-bit Systems |  | [KB5029649](https://patchblox.com/security/data/fix/microsoft/kb5029649.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 22H2 for ARM64-based Systems |  | [KB5029649](https://patchblox.com/security/data/fix/microsoft/kb5029649.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 22H2 for x64-based Systems |  | [KB5029649](https://patchblox.com/security/data/fix/microsoft/kb5029649.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 22H2 for ARM64-based Systems |  | [KB5028948](https://patchblox.com/security/data/fix/microsoft/kb5028948.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 22H2 for x64-based Systems |  | [KB5028948](https://patchblox.com/security/data/fix/microsoft/kb5028948.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 21H2 for ARM64-based Systems |  | [KB5029650](https://patchblox.com/security/data/fix/microsoft/kb5029650.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 21H2 for x64-based Systems |  | [KB5029650](https://patchblox.com/security/data/fix/microsoft/kb5029650.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2022 |  | [KB5029655](https://patchblox.com/security/data/fix/microsoft/kb5029655.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2022 (Server Core installation) |  | [KB5029655](https://patchblox.com/security/data/fix/microsoft/kb5029655.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 3.5 and 4.6.2 on Windows 10 for 32-bit Systems | 10240.20107 | [KB5029259](https://patchblox.com/security/data/fix/microsoft/kb5029259.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 3.5 and 4.6.2 on Windows 10 for x64-based Systems | 10240.20107 | [KB5029259](https://patchblox.com/security/data/fix/microsoft/kb5029259.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 4.6.2 on Windows Server 2008 for 32-bit Systems Service Pack 2 |  | [KB5029654](https://patchblox.com/security/data/fix/microsoft/kb5029654.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 4.6.2 on Windows Server 2008 for 32-bit Systems Service Pack 2 |  | [KB5029569](https://patchblox.com/security/data/fix/microsoft/kb5029569.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 4.6.2 on Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) |  | [KB5029654](https://patchblox.com/security/data/fix/microsoft/kb5029654.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 4.6.2 on Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) |  | [KB5029569](https://patchblox.com/security/data/fix/microsoft/kb5029569.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 4.6.2 on Windows Server 2008 for x64-based Systems Service Pack 2 |  | [KB5029654](https://patchblox.com/security/data/fix/microsoft/kb5029654.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 4.6.2 on Windows Server 2008 for x64-based Systems Service Pack 2 |  | [KB5029569](https://patchblox.com/security/data/fix/microsoft/kb5029569.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 4.6.2 on Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) |  | [KB5029654](https://patchblox.com/security/data/fix/microsoft/kb5029654.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 4.6.2 on Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) |  | [KB5029569](https://patchblox.com/security/data/fix/microsoft/kb5029569.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 |  | [KB5029651](https://patchblox.com/security/data/fix/microsoft/kb5029651.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 |  | [KB5029566](https://patchblox.com/security/data/fix/microsoft/kb5029566.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) |  | [KB5029651](https://patchblox.com/security/data/fix/microsoft/kb5029651.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) |  | [KB5029566](https://patchblox.com/security/data/fix/microsoft/kb5029566.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 |  | [KB5029652](https://patchblox.com/security/data/fix/microsoft/kb5029652.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 |  | [KB5029567](https://patchblox.com/security/data/fix/microsoft/kb5029567.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 (Server Core installation) |  | [KB5029652](https://patchblox.com/security/data/fix/microsoft/kb5029652.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 (Server Core installation) |  | [KB5029567](https://patchblox.com/security/data/fix/microsoft/kb5029567.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2 |  | [KB5029568](https://patchblox.com/security/data/fix/microsoft/kb5029568.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2 |  | [KB5029653](https://patchblox.com/security/data/fix/microsoft/kb5029653.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2 (Server Core installation) |  | [KB5029568](https://patchblox.com/security/data/fix/microsoft/kb5029568.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2 (Server Core installation) |  | [KB5029653](https://patchblox.com/security/data/fix/microsoft/kb5029653.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for 32-bit Systems |  | [KB5028952](https://patchblox.com/security/data/fix/microsoft/kb5028952.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for x64-based Systems |  | [KB5028952](https://patchblox.com/security/data/fix/microsoft/kb5028952.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 |  | [KB5029651](https://patchblox.com/security/data/fix/microsoft/kb5029651.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 |  | [KB5029566](https://patchblox.com/security/data/fix/microsoft/kb5029566.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) |  | [KB5029651](https://patchblox.com/security/data/fix/microsoft/kb5029651.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) |  | [KB5029566](https://patchblox.com/security/data/fix/microsoft/kb5029566.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 4.8 on Windows Server 2012 |  | [KB5029652](https://patchblox.com/security/data/fix/microsoft/kb5029652.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 4.8 on Windows Server 2012 |  | [KB5029567](https://patchblox.com/security/data/fix/microsoft/kb5029567.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 4.8 on Windows Server 2012 (Server Core installation) |  | [KB5029652](https://patchblox.com/security/data/fix/microsoft/kb5029652.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 4.8 on Windows Server 2012 (Server Core installation) |  | [KB5029567](https://patchblox.com/security/data/fix/microsoft/kb5029567.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 4.8 on Windows Server 2012 R2 |  | [KB5029568](https://patchblox.com/security/data/fix/microsoft/kb5029568.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 4.8 on Windows Server 2012 R2 |  | [KB5029653](https://patchblox.com/security/data/fix/microsoft/kb5029653.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 4.8 on Windows Server 2012 R2 (Server Core installation) |  | [KB5029568](https://patchblox.com/security/data/fix/microsoft/kb5029568.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 4.8 on Windows Server 2012 R2 (Server Core installation) |  | [KB5029653](https://patchblox.com/security/data/fix/microsoft/kb5029653.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 4.8 on Windows Server 2016 |  | [KB5028952](https://patchblox.com/security/data/fix/microsoft/kb5028952.md) | Aug 8, 2023 |
| Microsoft | Microsoft .NET Framework 4.8 on Windows Server 2016 (Server Core installation) |  | [KB5028952](https://patchblox.com/security/data/fix/microsoft/kb5028952.md) | Aug 8, 2023 |

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