This indicates a possible attack against a stack-based buffer-overflow vulnerability in WM Downloader.
The vulnerability is due to the vulnerable software's inability to properly handle malformed user input. An attacker may exploit this to execute arbitrary code by sending a malicious .m3u file.
WM Downloader 188.8.131.52 is vulnerable. Other versions may also be affected.
Currently we are unaware of any vendor-supplied patches or updates.