# CVE-2023-21716: Microsoft Word Remote Code Execution Vulnerability

CVE-2023-21716 is fixed in 13 products on 1 platform, first by KB5002309, released February 17, 2023. It is not reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/cve/CVE-2023-21716
- Priority: Urgent
- CVSS: 9.8 (Critical)
- EPSS: 0.8480
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Feb 17, 2023
- Weakness: Integer Overflow or Wraparound
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21716

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Microsoft Office Online Server |  | [KB5002309](https://patchblox.com/security/data/fix/microsoft/kb5002309.md) | Feb 17, 2023 |
| Microsoft | Microsoft Office Web Apps Server 2013 Service Pack 1 |  | [KB5002313](https://patchblox.com/security/data/fix/microsoft/kb5002313.md) | Feb 17, 2023 |
| Microsoft | Microsoft SharePoint Enterprise Server 2013 Service Pack 1 |  | [KB5002312](https://patchblox.com/security/data/fix/microsoft/kb5002312.md) | Feb 17, 2023 |
| Microsoft | Microsoft SharePoint Enterprise Server 2013 Service Pack 1 |  | [KB5002347](https://patchblox.com/security/data/fix/microsoft/kb5002347.md) | Feb 17, 2023 |
| Microsoft | Microsoft SharePoint Enterprise Server 2013 Service Pack 1 |  | [KB5002346](https://patchblox.com/security/data/fix/microsoft/kb5002346.md) | Feb 17, 2023 |
| Microsoft | Microsoft SharePoint Enterprise Server 2016 |  | [KB5002325](https://patchblox.com/security/data/fix/microsoft/kb5002325.md) | Feb 17, 2023 |
| Microsoft | Microsoft SharePoint Foundation 2013 Service Pack 1 |  | [KB5002312](https://patchblox.com/security/data/fix/microsoft/kb5002312.md) | Feb 17, 2023 |
| Microsoft | Microsoft SharePoint Foundation 2013 Service Pack 1 |  | [KB5002347](https://patchblox.com/security/data/fix/microsoft/kb5002347.md) | Feb 17, 2023 |
| Microsoft | Microsoft SharePoint Server 2019 |  | [KB5002342](https://patchblox.com/security/data/fix/microsoft/kb5002342.md) | Feb 17, 2023 |
| Microsoft | Microsoft SharePoint Server 2019 |  | [KB5002330](https://patchblox.com/security/data/fix/microsoft/kb5002330.md) | Feb 17, 2023 |
| Microsoft | Microsoft SharePoint Server Subscription Edition |  | [KB5002353](https://patchblox.com/security/data/fix/microsoft/kb5002353.md) | Feb 17, 2023 |
| Microsoft | Microsoft SharePoint Server Subscription Edition |  | [KB5002352](https://patchblox.com/security/data/fix/microsoft/kb5002352.md) | Feb 17, 2023 |
| Microsoft | Microsoft Word 2013 RT Service Pack 1 |  | [KB5002316](https://patchblox.com/security/data/fix/microsoft/kb5002316.md) | Feb 17, 2023 |
| Microsoft | Microsoft Word 2013 Service Pack 1 (32-bit editions) |  | [KB5002316](https://patchblox.com/security/data/fix/microsoft/kb5002316.md) | Feb 17, 2023 |
| Microsoft | Microsoft Word 2013 Service Pack 1 (64-bit editions) |  | [KB5002316](https://patchblox.com/security/data/fix/microsoft/kb5002316.md) | Feb 17, 2023 |
| Microsoft | Microsoft Word 2016 (32-bit edition) |  | [KB5002323](https://patchblox.com/security/data/fix/microsoft/kb5002323.md) | Feb 17, 2023 |
| Microsoft | Microsoft Word 2016 (64-bit edition) |  | [KB5002323](https://patchblox.com/security/data/fix/microsoft/kb5002323.md) | Feb 17, 2023 |
| Microsoft | SharePoint Server Subscription Edition Language Pack |  | [KB5002352](https://patchblox.com/security/data/fix/microsoft/kb5002352.md) | Feb 17, 2023 |

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Data as of 2026-11-08T13:06:02Z 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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