General Electric (GE) Digital Proficy HMI/SCADA - CIMPLICITY before 8.2 SIM 27 mishandles service DACLs, which allows local users to modify a service configuration via unspecified vectors.
https://ics-cert.us-cert.gov/advisories/ICSA-16-194-02
https://ge-ip.force.com/communities/en_US/Article/GE-Digital-Security-Advisory-GED-16-01