Why are routers easily hacked
The default password admin/admin has not been changed by anyone; Manufacturers do not update firmware; Hard coded backdoors exposed on the public network; The 80/443 ports are directly exposed.
Common vulnerabilities
Hard coded password; Command injection; Unauthorized access; Buffer overflow; UPnP automatic port mapping.
Reinforcement suggestions
Change default password; Close remote management; Timely firmware flashing; Turn off UPnP; Change the management port; Use a firewall.
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