

To get the standalone package for KB5020435, search for it in the Microsoft Update Catalog. It is a cumulative update, so you do not need to apply any previous update before installing it. Resolution: This issue was resolved in the out-of-band update KB5020435. Click the "Submit" button.įor additional information, see Send feedback to Microsoft with the Feedback Hub app.

When this issue is encountered, your app will receive SEC_E_ILLEGAL_MESSAGE when the connection fails.

Note for developers: Affected connections are likely to be sending multiple frames within a single input buffer, specifically one or more complete records with a partial record that is less than 5 bytes all sent in a single buffer. Microsoft has received reports that after installing KB5018410, some types of SSL (Secure Sockets Layer) and TLS (Transport Layer Security) connections might have handshake failures.
