CVE-2021-47775 affects YouTube Video Grabber (YouTube Downloader) version 1.9.9.1, containing a buffer overflow vulnerability. Attackers can execute arbitrary code by overwriting the Structured Exception Handler (SEH). The exploit requires crafting a malicious 712-byte payload with SEH manipulation. Successful exploitation allows attackers to trigger a bind shell connection on a specified local port. This vulnerability enables remote code execution through SEH-based buffer overflow techniques.