A vulnerability, which was classified as problematic, was found in D-Link DIR-823X 240126/240802. This affects the function setwifiblacklists of the file /goform/setwifiblacklists of the component HTTP POST Request Handler. The manipulation of the argument macList leads to null pointer dereference. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.