By Admin on Friday, 21 October 2022
Category: All

WinHTTP Security Error 12175

​After the Windows Update KB5018410 (10 October 2022) TLS 1.0 and TLS 1.1 were not supported anymore, but this seems has affected to TLS 1.2 protocol, so when using WinHTTP to connect using TLS 1.2, the following error was raised and the connection was closed:

Security Error 12175

This issue affect to users running the following sgcWebSockets components (under Windows 10):

How to Fix 

​At the moment of writing this post, the way to fix this is install manually the following update:

KB5020435

Which fixes the TLS issue. To install this update, follow the next steps

  1. Go to https://www.catalog.update.microsoft.com/Search.aspx?q=KB5020435
  2. Download the correct version​ (For Windows 10 x64, will be "2022-10 Cumulative Update for Windows 10 Version 21H2 for x64-based Systems (KB5020435)​")
  3. Install the update and restart

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