Race condition in the Enterprise Tree ActiveX control (EnterpriseControls.dll 11.5.0.313) in Crystal Reports XI Release 2 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via the SelectedSession method, which triggers a buffer overflow.
https://www.exploit-db.com/exploits/4931
https://exchange.xforce.ibmcloud.com/vulnerabilities/39743
https://euvd.enisa.europa.eu/vulnerability/EUVD-2008-0389