Apex domains cannot have CNAME records.
Question and response
Question
dig thesecurityweb.com. NS
Answer
thesecurityweb.com. 5 NS ns1.thesecurityweb.com.
thesecurityweb.com. 5 NS ns2.thesecurityweb.com.
Authority
The response has no authority records.
Additional
ns1.thesecurityweb.com. 5 A 198.23.167.18
ns2.thesecurityweb.com. 5 A 198.23.167.21
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0