September 8, 2020
.NET Framework 3.5, 4.7.2 and 4.8
This update is included in the Cumulative Update that's dated September 8, 2020. Parts of this update were previously released in the Cumulative Update that's dated August 20, 2020.
ClickOnce will no longer download applications from untrusted servers which use NTLM authentication, but, instead, will fail with “Authentication failed”. Sites in the Local Intranet and Trusted sites zones will continue to authenticate as before.
For a list of improvements that were released with this update, please see the article links in the Additional Information section of this article.