The device supports SSL/TLS key exchanges that are cryptographically weaker than recommended. Key exchanges must be recommended by IANA and should provide at least 224 bits of security, which translates to a minimum key size of 2048 bits for Diffie Hellman and RSA key exchanges. (Source: Tenable Nessus)
As this issue is assessed as low severity, users may evaluate their environments and decide if updating is required.