The vulnerability is related to the improper neutralization of special elements used in a template engine, allowing a remote, unauthenticated attacker to execute arbitrary commands on the affected system by sending a specially crafted HTTP request. This issue has been exploited in real-world attacks, with threat actors targeting older versions of the HTTP File Server to drop malware and cryptocurrency mining software. The estimated number of potentially affected devices worldwide is not explicitly stated, but it is known that over 89,700 services are found to be vulnerable.