# KB4018588: July 2017 security update

KB4018588, released July 11, 2017, fixes 3 CVEs across 4 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/kb4018588
- Platform: Microsoft
- Released: Jul 11, 2017
- Priority: High (Closes CVE-2017-8560, high severity)
- CVEs: 3, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://support.microsoft.com/help/4018588

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [Microsoft Exchange Server 2010 Service Pack 3](https://patchblox.com/security/data/product/microsoft/microsoft-exchange-server-2010-service-pack-3.md) |  |  |
| [Microsoft Exchange Server 2013 Cumulative Update 16](https://patchblox.com/security/data/product/microsoft/microsoft-exchange-server-2013-cumulative-update-16.md) |  |  |
| [Microsoft Exchange Server 2013 Service Pack 1](https://patchblox.com/security/data/product/microsoft/microsoft-exchange-server-2013-service-pack-1.md) |  |  |
| [Microsoft Exchange Server 2016 Cumulative Update 5](https://patchblox.com/security/data/product/microsoft/microsoft-exchange-server-2016-cumulative-update-5.md) |  |  |

## CVEs this fix closes

| CVE | Priority | Component | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2017-8559](https://patchblox.com/security/data/cve/CVE-2017-8559.md) | High | Microsoft Exchange Server | n/a | 0.0342 |  |
| [CVE-2017-8560](https://patchblox.com/security/data/cve/CVE-2017-8560.md) | High | Microsoft Exchange Server | n/a | 0.0342 |  |
| [CVE-2017-8621](https://patchblox.com/security/data/cve/CVE-2017-8621.md) | Routine | Microsoft Exchange Server | n/a | 0.0317 |  |

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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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