# CVE-2021-40442: Microsoft Excel Remote Code Execution Vulnerability

CVE-2021-40442 is fixed in 8 products on 1 platform, first by KB5002072, released November 16, 2021. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2021-40442
- Priority: High
- CVSS: 7.8 (Important)
- EPSS: 0.0229
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Nov 16, 2021
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-40442

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Microsoft Excel 2013 RT Service Pack 1 |  | [KB5002072](https://patchblox.com/security/data/fix/microsoft/kb5002072.md) | Nov 16, 2021 |
| Microsoft | Microsoft Excel 2013 Service Pack 1 (32-bit editions) |  | [KB5002072](https://patchblox.com/security/data/fix/microsoft/kb5002072.md) | Nov 16, 2021 |
| Microsoft | Microsoft Excel 2013 Service Pack 1 (64-bit editions) |  | [KB5002072](https://patchblox.com/security/data/fix/microsoft/kb5002072.md) | Nov 16, 2021 |
| Microsoft | Microsoft Excel 2016 (32-bit edition) |  | [KB5002056](https://patchblox.com/security/data/fix/microsoft/kb5002056.md) | Nov 16, 2021 |
| Microsoft | Microsoft Excel 2016 (64-bit edition) |  | [KB5002056](https://patchblox.com/security/data/fix/microsoft/kb5002056.md) | Nov 16, 2021 |
| Microsoft | Microsoft Office Online Server |  | [KB5002053](https://patchblox.com/security/data/fix/microsoft/kb5002053.md) | Nov 16, 2021 |
| Microsoft | Microsoft Office Web Apps Server 2013 Service Pack 1 |  | [KB5002065](https://patchblox.com/security/data/fix/microsoft/kb5002065.md) | Nov 16, 2021 |
| Microsoft | Microsoft SharePoint Enterprise Server 2013 Service Pack 1 |  | [KB5002063](https://patchblox.com/security/data/fix/microsoft/kb5002063.md) | Nov 16, 2021 |

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Data as of 2026-11-09T19:38:12Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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