VizibleSoft Security Advisory #2004/01 – eSignal versions 7.6 and 7.5 have a stack based buffer overflow in the WinSig.exe binary, allowing for remote code execution.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/32951/vz012004-esignal7.txt
Source: https://packetstormsecurity.com/files/32951/vz012004-esignal7.txt.html