# KB4571334: July 2020 security update

KB4571334, released July 14, 2020, fixes 1 CVE in Microsoft Lync Server 2013. 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/kb4571334
- Platform: Microsoft
- Released: Jul 14, 2020
- Priority: Urgent (Closes CVE-2020-1025, rated Critical)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://support.microsoft.com/help/4571334

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [Microsoft Lync Server 2013](https://patchblox.com/security/data/product/microsoft/microsoft-lync-server-2013.md) |  |  |

## CVEs this fix closes

| CVE | Priority | Component | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2020-1025](https://patchblox.com/security/data/cve/CVE-2020-1025.md) | Urgent | Skype for Business | n/a | 0.0585 |  |

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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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