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    BIS 4.9 and older: COM security changes for Microsoft operating systems

    Possible causes and solution(s)

     

    • Causes

     

    Only if you are using BIS with an older version than 4.9.1 in conjunction with a Connection Server (OPC server is running on a different computer than Login Server)

     

    With beginning of January 2022 Microsoft plans to roll out an update with a possible impact on BIS Connection Servers at all older BIS versions: 

    KB5004442—Manage changes for Windows DCOM Server Security Feature Bypass (CVE-2021-26414) (microsoft...

     

    • Solution

     

    Beginning with BIS 4.9.1 we changed the COM standard security settings to the values shown in the screenshot.

    Central_Support_0-1642141994015.png

     

    If you are using BIS with a Connection Server before version 4.9.1, these changes must be implemented manually before installing the security update from Microsoft.

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    Last update:
    a week ago
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