# KB5005040: August 2021 cumulative update for Windows 10 1507

KB5005040, released August 10, 2021, fixes 22 CVEs across 2 products. One of them is being exploited (CVE-2021-34484); 1 on CISA KEV. Patch Radar priority: Patch now. The product is no longer supported.

- Web page: https://patchblox.com/security/fix/microsoft/kb5005040
- Platform: Microsoft
- Released: Aug 10, 2021
- Priority: Patch now (Closes CVE-2021-34484, exploited (CISA KEV))
- CVEs: 22, exploited: 1, on CISA KEV: 1
- Vendor advisory: https://support.microsoft.com/help/5005040

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [Windows 10 for 32-bit Systems](https://patchblox.com/security/data/product/microsoft/windows-10-for-32-bit-systems.md) |  | 10240.19022 |
| [Windows 10 for x64-based Systems](https://patchblox.com/security/data/product/microsoft/windows-10-for-x64-based-systems.md) |  | 10240.19022 |

## CVEs this fix closes

| CVE | Priority | Component | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2021-34484](https://patchblox.com/security/data/cve/CVE-2021-34484.md) | Patch now | Windows User Profile Service | 7.8 | 0.2183 | CISA KEV |
| [CVE-2021-26424](https://patchblox.com/security/data/cve/CVE-2021-26424.md) | Urgent | Windows TCP/IP | 9.9 | 0.6113 | More likely |
| [CVE-2021-34481](https://patchblox.com/security/data/cve/CVE-2021-34481.md) | Urgent | Windows Print Spooler Components | 8.8 | 0.4772 | Disclosed |
| [CVE-2021-34480](https://patchblox.com/security/data/cve/CVE-2021-34480.md) | Urgent | Microsoft Scripting Engine | 6.8 | 0.3419 | More likely |
| [CVE-2021-34535](https://patchblox.com/security/data/cve/CVE-2021-34535.md) | Urgent | Remote Desktop Client | 8.8 | 0.2186 | More likely |
| [CVE-2021-26432](https://patchblox.com/security/data/cve/CVE-2021-26432.md) | Urgent | Windows Services for NFS ONCRPC XDR Driver | 9.8 | 0.1143 | More likely |
| [CVE-2021-36947](https://patchblox.com/security/data/cve/CVE-2021-36947.md) | Urgent | Windows Print Spooler Components | 8.8 | 0.0756 | More likely |
| [CVE-2021-36936](https://patchblox.com/security/data/cve/CVE-2021-36936.md) | Urgent | Windows Print Spooler Components | 8.8 | 0.0748 | Disclosed |
| [CVE-2021-34530](https://patchblox.com/security/data/cve/CVE-2021-34530.md) | Urgent | Microsoft Graphics Component | 7.8 | 0.0244 |  |
| [CVE-2021-34534](https://patchblox.com/security/data/cve/CVE-2021-34534.md) | Urgent | Windows MSHTML Platform | 6.8 | 0.0224 |  |
| [CVE-2021-26433](https://patchblox.com/security/data/cve/CVE-2021-26433.md) | High | Windows Services for NFS ONCRPC XDR Driver | 7.5 | 0.0357 |  |
| [CVE-2021-36926](https://patchblox.com/security/data/cve/CVE-2021-36926.md) | High | Windows Services for NFS ONCRPC XDR Driver | 7.5 | 0.0350 |  |
| [CVE-2021-36932](https://patchblox.com/security/data/cve/CVE-2021-36932.md) | High | Windows Services for NFS ONCRPC XDR Driver | 7.5 | 0.0350 |  |
| [CVE-2021-36933](https://patchblox.com/security/data/cve/CVE-2021-36933.md) | High | Windows Services for NFS ONCRPC XDR Driver | 7.5 | 0.0350 |  |
| [CVE-2021-34533](https://patchblox.com/security/data/cve/CVE-2021-34533.md) | High | Microsoft Graphics Component | 7.8 | 0.0244 |  |
| [CVE-2021-36937](https://patchblox.com/security/data/cve/CVE-2021-36937.md) | High | Microsoft Windows Codecs Library | 7.8 | 0.0230 |  |
| [CVE-2021-34483](https://patchblox.com/security/data/cve/CVE-2021-34483.md) | High | Windows Print Spooler Components | 7.8 | 0.0109 |  |
| [CVE-2021-26425](https://patchblox.com/security/data/cve/CVE-2021-26425.md) | High | Windows Event Tracing | 7.8 | 0.0090 |  |
| [CVE-2021-26426](https://patchblox.com/security/data/cve/CVE-2021-26426.md) | High | Windows User Profile Service | 7.0 | 0.0071 |  |
| [CVE-2021-34536](https://patchblox.com/security/data/cve/CVE-2021-34536.md) | High | Windows Storage Spaces Controller | 7.8 | 0.0064 |  |
| [CVE-2021-34537](https://patchblox.com/security/data/cve/CVE-2021-34537.md) | High | Windows Bluetooth Service | 7.8 | 0.0050 |  |
| [CVE-2021-36938](https://patchblox.com/security/data/cve/CVE-2021-36938.md) | Routine | Windows Cryptographic Services | 5.5 | 0.0088 |  |

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Data as of 2026-11-07T06:34:28Z 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