Stack-based buffer overflow in SigPlus Pro 3.74 ActiveX control allows remote attackers to execute arbitrary code via a long eighth argument (HexString) to the LCDWriteString method.

Topaz Systems SigPlus Pro ActiveX Control 3.95, and possibly other versions before 4.29, allows remote attackers to execute arbitrary code by calling the exposed unsafe (1) SetLogFilePath and (2) SigMessage methods to create arbitrary files with arbitrary content.

Multiple heap-based buffer overflows in Topaz Systems SigPlus Pro ActiveX Control 3.95, and possibly other versions before 4.29, allow remote attackers to execute arbitrary code via a long (1) KeyString property, (2) NewPath parameter to the SetLocalIniFilePath method, or (3) NewPortPath parameter to the SetTabletPortPath method.