An attacker with access to the hard-coded credentials may gain access to the operating system of the managed switch with root privileges, which may allow manipulation of the operating system of the managed switch.
An attacker with access to the hard-coded SSH key may disrupt communication or compromise the managed switch. The SSH-keys cannot be regenerated by users and all switches use the same key.
Vendor recommends users update their managed switch to the latest firmware.
852-303: v1.2.2.S0 or later
852-1305: v1.1.6.S0 or later
852-1505: v1.1.5.S0 or later