The product is running a service that is using a publicly known SSH private key. An attacker may use this key to decrypt intercepted traffic between users and the device. A remote attacker can also perform a man-in-the-middle attack in order to gain access to the system or modify data in transit.
(Source: Tenable Nessus)
To enhance the security of the product, users should implement appropriate mitigations or solutions to avoid potential security issue.