# KB4011159: October 2017 security update

KB4011159, released October 10, 2017, fixes 1 CVE across 2 products. None of them is reported as exploited. Patch Radar priority: High. The product is no longer supported.

- Web page: https://patchblox.com/security/fix/microsoft/kb4011159
- Platform: Microsoft
- Released: Oct 10, 2017
- Priority: High (Closes CVE-2017-11786, high severity)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://support.microsoft.com/help/4011159

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [Skype for Business 2016 (32-bit)](https://patchblox.com/security/data/product/microsoft/skype-for-business-2016-32-bit.md) |  |  |
| [Skype for Business 2016 (64-bit)](https://patchblox.com/security/data/product/microsoft/skype-for-business-2016-64-bit.md) |  |  |

## CVEs this fix closes

| CVE | Priority | Component | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2017-11786](https://patchblox.com/security/data/cve/CVE-2017-11786.md) | High | Microsoft Office | n/a | 0.0939 |  |

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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo