Message CTG8276E Insufficient security permissions to communicate with the CICS Transaction Gateway service is logged when starting CICS® Transaction Gateway.
The ctgadmin command does not have sufficient privileges to interact with the CICS Transaction Gateway service running on Microsoft Windows.
On Windows platforms, CICS Transaction Gateway runs as a Microsoft Windows Service, and the ctgadmin utility uses the Windows Service Control Manager (SCM) to start and stop the product. Starting or stopping a Windows Service requires administrator permissions; this means that the ctgadmin command must be run with administrator permissions when starting or stopping CICS Transaction Gateway. As part of the Windows User Account Control (UAC) feature, applications are started with standard user account permissions for security reasons, even if the user has administrator privileges. To resolve this problem, when starting or stopping CICS TG, you must be logged in using a user with administrative permissions and you must start ctgadmin with the Windows Run as Administrator function. When using ctgadmin for tasks other than starting or stopping CICS Transaction Gateway, administrator permissions are not required.
See your Microsoft Windows documentation for more information about UAC: