At the beginning of this year, we reported about the secret backdoor ‘TCP 32764’ discovered in several routers including, Linksys, Netgear, Cisco and Diamond that allowed an attacker to send commands to the vulnerable routers at TCP port 32764 from a command-line shell without being authenticated as the administrator.

The Reverse-engineer from France Eloi Vanderbeken, who discovered this backdoor has found that although the problem has been patched in the latest firmware release, but SerComm has added the same backdoor again in another way.

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