how and where to look for information about SAP vulnerabilities

Hello,

i've a question about security issues, that are known. I was advised to check if our SAP version is vulnerable - particulary about few vulnerabilites.

I've got CVE's, and i find nothing when i use search engine: CVE-2015-2073.CVE-2015-2076,CVE-2015-2074,CVE-2015-2075. Could anyone help me and say how to look for information about this vulnerabilities and affected versions / patches using CVE's?