netgear multi devices password disclosure: fix check method too restrictive

routersploit/modules/exploits/netgear/multi_password_disclosure-201701.py

@@ -133,6 +133,7 @@ class Exploit(exploits.Exploit):
 
         if response is not None:
             header = response.headers.get('WWW-Authenticate')
-            return header is not None and 'NETGEAR' in header.upper()  # target is vulnerable
+            token = self.extract_token(response.text)
+            return header is not None and 'NETGEAR' in header.upper() and token is not False  # target is vulnerable
 
         return False  # target is not vulnerable