Netgear R8500 v1.0.2.160 was discovered to contain multiple stack overflow vulnerabilities in the component ipv6_fix.cgi via the ipv6_wan_ipaddr, ipv6_lan_ipaddr, ipv6_wan_length, and ipv6_lan_length parameters. These vulnerabilities allow attackers to cause a Denial of Service (DoS) via a crafted POST request.