Microsoft’s June 2021 security updates have passed Citrix testing (the updates are listed below). The testing is not all-inclusive; all tests are executed against English only environments and issues may still be found upon implementation. Follow best practices for testing and installing software updates/patches in a development environment before implementing the updates in a production environment.

• XenApp/XenDesktop 7.15 CU7
• Virtual Apps and Desktops 7 1912 CU3
• Virtual Apps and Desktops 7 2106

Where applicable, the above Citrix products were tested with below updates.

Product	KB Article
Windows 10 v2004 (May 2020 Update) / 20H2 (October 2020 Update) / 21H1 (May 2021 Update)	5003637
Windows 10 v1903 (May 2019 Update) / v1909	5003635
Windows 10 v1809 (October 2018 Update) and Windows Server 2019	5003646
Windows Server 2016	5003638
Windows 8.1 and Windows Server 2012 R2	5003671, 5003681
Windows 7, Windows 2008 R2	5003667, 5003694
Microsoft Office	5001955, 5001963, 5001951, 5001947, 5001953, 5001950, 5001934, 5001942

UPDATE JULY 09, 2021:
Microsoft recently made available out-of-band security patches that contain protections for a remote code execution exploit in the Windows Print Spooler service known as 'PrintNightmare'. The below updates were also tested with Citrix products listed above. 
 

Product	KB Article
Windows 10 v2004 (May 2020 Update) / 20H2 (October 2020 Update) / 21H1 (May 2021 Update)	5004945
Windows 10 v1903 (May 2019 Update) / v1909	5004946
Windows Server 2019	5004947
Windows Server 2016	5004948
Windows Server 2012 R2	5004954,  5004958

Note: Patches for Operating Systems (E.g. Windows Vista, Server 2008, Server 2012, Windows 10 v1507 etc) and products (E.g. Office Web Apps, Online Server, SharePoint, Dynamics 365 etc) that are not listed above were not validated.

Visit the Microsoft Security Response Center (MSRC) page to view Microsoft security updates.
 

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Microsoft’s June 2021 security updates have passed Citrix testing (the updates are listed below). The testing is not all-inclusive; all tests are executed against English only environments and issues may still be found upon implementation. Follow best practices for testing and installing software updates/patches in a development environment before implementing the updates in a production environment.