Introduction

This article lists the available updates for Microsoft Lync Server 2013, and specifies the applicability of the updates for each server role. The latest update for Lync Server 2013 was released in February 2021.

Improvements and fixes

Security fix

The February 2021 cumulative update for Lync Server 2013 contains the following security fixes:

  • KB 5000675 Description of the security update for Skype for Business Server and Lync Server: February 9, 2021 (KB5000675)

  • KB 5000688 Description of the security update for Skype for Business Server and Lync Server: February 9, 2021 (KB5000688)

The September 2019 cumulative update for Lync Server 2013 contains the following security fix:

  • 4515509 Fix for Lync Server 2013 information disclosure vulnerability

The June 2019 cumulative update for Lync Server 2013 contains the following security fix:

  • 4506009 Fix for Lync Server 2013 and Lync Server 2010 Denial of Service Vulnerability

The July 2018 cumulative update for Lync Server 2013 contains the following security fix:

  • 4494279 Fix for Skype for Business 2015 and Lync Server 2013 spoofing vulnerability

Improvements and fixes in the September 2021 update

This cumulative update fixes the following issue:

Improvements and fixes in the May 2019 update

This cumulative update includes a defense-in-depth fix.

Improvements and fixes in the January 2019 update

This cumulative update includes a defense-in-depth fix, and it also fixes the following issues:

References

See the general information about the standard terminology that Microsoft uses to describe software updates.

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