Yes, only if you have anything that is using BMC Atrium Core Web Services , you should apply the hotfix.
Do you have the techincal bulletin id or link ?
If you have Atrium Integration with BBSA/BladeLogic , then you might be affected, it does *not* affect the functionality of BBSA other than the Integrations .
Are you using the Atrium Core Webservices Integrated with BBSA ?
If not, you need not worry about this