# KB5005043: August 2021 cumulative update for Windows 10 1607

KB5005043, released August 10, 2021, fixes 24 CVEs across 4 products. 2 of them are being exploited (CVE-2021-36942); 2 on CISA KEV. Patch Radar priority: Patch now.

- Web page: https://patchblox.com/security/fix/microsoft/kb5005043
- Platform: Microsoft
- Released: Aug 10, 2021
- Priority: Patch now (Closes CVE-2021-36942, exploited (CISA KEV, ransomware))
- CVEs: 24, exploited: 2, on CISA KEV: 2
- Vendor advisory: https://support.microsoft.com/help/5005043

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [Windows 10 Version 1607 for 32-bit Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-1607-for-32-bit-systems.md) |  | 14393.4583 |
| [Windows 10 Version 1607 for x64-based Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-1607-for-x64-based-systems.md) |  | 14393.4583 |
| [Windows Server 2016](https://patchblox.com/security/data/product/microsoft/windows-server-2016.md) |  | 14393.4583 |
| [Windows Server 2016 (Server Core installation)](https://patchblox.com/security/data/product/microsoft/windows-server-2016-server-core-installation.md) |  | 14393.4583 |

## CVEs this fix closes

| CVE | Priority | Component | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2021-36942](https://patchblox.com/security/data/cve/CVE-2021-36942.md) | Patch now | Windows NTLM | 7.5 | 0.6602 | CISA KEV, Ransomware, Disclosed |
| [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-2021-34487](https://patchblox.com/security/data/cve/CVE-2021-34487.md) | High | Windows Event Tracing | 7.0 | 0.0061 |  |
| [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 |  |

---

Data as of 2026-11-08T06:59:42Z 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

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.