This indicates an attempt to exploit a buffer overflow vulnerability in SSReader.
There is a buffer overflow vulnerability in the register function in Ultra Star Reader ActiveX control, in SSReader. This issue is caused by a program error that leads to a buffer overflow in the "pdg2.dll" ActiveX control. The overflow occurs when processing an overly long argument passed to the "Register()" method.
SSReader, any version.
Currently we are not aware of any vendor supplied patch for this issue.