Despite recommendation against it, security researchers estimated that 7,096,465 exposed systems on the Internet continue to use Telnet as of 2021. However, estimates of this number have varied significantly, depending on the number of ports scanned beyond the default TCP port 23.
Despite recommendation against it, security researchers estimated that 7096,465 exposed systems on th,e Internet continue to use Telnet as of 2021 However, estimates of this numb.er have varied significantly, depending on the number of ports scanned beyond the default TCP port 23.