# KB5100989: July 2026 security update

KB5100989, released July 14, 2026, fixes 17 CVEs across 5 products. None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/microsoft/kb5100989
- Platform: Microsoft
- Released: Jul 14, 2026
- Priority: High (Closes CVE-2026-50649, high severity)
- CVEs: 17, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://support.microsoft.com/help/5100989

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for 32-bit Systems](https://patchblox.com/security/data/product/microsoft/microsoft-.net-framework-3.5-and-4.7.2-on-windows-10-version-1809-for-32-bit-systems.md) |  |  |
| [Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for ARM64-based Systems](https://patchblox.com/security/data/product/microsoft/microsoft-.net-framework-3.5-and-4.7.2-on-windows-10-version-1809-for-arm64-based-systems.md) |  |  |
| [Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for x64-based Systems](https://patchblox.com/security/data/product/microsoft/microsoft-.net-framework-3.5-and-4.7.2-on-windows-10-version-1809-for-x64-based-systems.md) |  |  |
| [Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019](https://patchblox.com/security/data/product/microsoft/microsoft-.net-framework-3.5-and-4.7.2-on-windows-server-2019.md) |  |  |
| [Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019 (Server Core installation)](https://patchblox.com/security/data/product/microsoft/microsoft-.net-framework-3.5-and-4.7.2-on-windows-server-2019-server-core-installation.md) |  |  |

## CVEs this fix closes

| CVE | Priority | Component | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-50646](https://patchblox.com/security/data/cve/CVE-2026-50646.md) | High | .NET Framework | 8.8 | 0.0402 |  |
| [CVE-2026-50649](https://patchblox.com/security/data/cve/CVE-2026-50649.md) | High | .NET | 8.8 | 0.0402 |  |
| [CVE-2026-50652](https://patchblox.com/security/data/cve/CVE-2026-50652.md) | High | Azure Active Directory | 7.5 | 0.0173 |  |
| [CVE-2026-47302](https://patchblox.com/security/data/cve/CVE-2026-47302.md) | High | .NET | 8.8 | 0.0117 |  |
| [CVE-2026-50525](https://patchblox.com/security/data/cve/CVE-2026-50525.md) | High | .NET | 8.8 | 0.0117 |  |
| [CVE-2026-50527](https://patchblox.com/security/data/cve/CVE-2026-50527.md) | High | .NET Framework | 8.8 | 0.0117 |  |
| [CVE-2026-50648](https://patchblox.com/security/data/cve/CVE-2026-50648.md) | High | .NET Framework | 8.8 | 0.0117 |  |
| [CVE-2026-50304](https://patchblox.com/security/data/cve/CVE-2026-50304.md) | High | Active Directory Federation Services (AD FS) | 7.5 | 0.0117 |  |
| [CVE-2026-50355](https://patchblox.com/security/data/cve/CVE-2026-50355.md) | High | Active Directory Federation Services (AD FS) | 7.5 | 0.0117 |  |
| [CVE-2026-50368](https://patchblox.com/security/data/cve/CVE-2026-50368.md) | High | Active Directory Federation Services (AD FS) | 7.5 | 0.0117 |  |
| [CVE-2026-50411](https://patchblox.com/security/data/cve/CVE-2026-50411.md) | High | Active Directory Federation Services (AD FS) | 7.5 | 0.0117 |  |
| [CVE-2026-50647](https://patchblox.com/security/data/cve/CVE-2026-50647.md) | High | Active Directory Federation Services (AD FS) | 7.5 | 0.0117 |  |
| [CVE-2026-50653](https://patchblox.com/security/data/cve/CVE-2026-50653.md) | High | Azure Active Directory | 7.5 | 0.0117 |  |
| [CVE-2026-50659](https://patchblox.com/security/data/cve/CVE-2026-50659.md) | High | .NET | 8.8 | 0.0074 |  |
| [CVE-2026-50650](https://patchblox.com/security/data/cve/CVE-2026-50650.md) | High | .NET Framework | 8.8 | 0.0046 |  |
| [CVE-2026-47304](https://patchblox.com/security/data/cve/CVE-2026-47304.md) | High | .NET | 9.8 | 0.0029 |  |
| [CVE-2026-50324](https://patchblox.com/security/data/cve/CVE-2026-50324.md) | Routine | Active Directory Federation Services (AD FS) | 5.9 | 0.0086 |  |

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Data as of 2026-11-07T18:46:35Z 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

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