# KB3213562: September 2017 security update

KB3213562, released September 15, 2017, fixes 2 CVEs across 3 products. None of them is reported as exploited. Patch Radar priority: Urgent. The product is no longer supported.

- Web page: https://patchblox.com/security/fix/microsoft/kb3213562
- Platform: Microsoft
- Released: Sep 15, 2017
- Priority: Urgent (Closes CVE-2017-8742, exploitation more likely)
- CVEs: 2, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://support.microsoft.com/help/3213562

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [Microsoft Excel Web App 2013 Service Pack 1](https://patchblox.com/security/data/product/microsoft/microsoft-excel-web-app-2013-service-pack-1.md) |  |  |
| [Microsoft Office Web Apps 2013 Service Pack 1](https://patchblox.com/security/data/product/microsoft/microsoft-office-web-apps-2013-service-pack-1.md) |  |  |
| [Microsoft Office Web Apps Server 2013 Service Pack 1](https://patchblox.com/security/data/product/microsoft/microsoft-office-web-apps-server-2013-service-pack-1.md) |  |  |

## CVEs this fix closes

| CVE | Priority | Component | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2017-8742](https://patchblox.com/security/data/cve/CVE-2017-8742.md) | Urgent | Microsoft Office | n/a | 0.2212 | More likely |
| [CVE-2017-8631](https://patchblox.com/security/data/cve/CVE-2017-8631.md) | High | Microsoft Office | n/a | 0.1699 |  |

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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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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