No known issues with D-Link productsOfficial Statement -
https://securityadvisories.dlink.com/announcement/publication.aspx?name=SAP10085What router do you have?
As far as making your network as secure as possible:
1. Turn off your router if not needed at night or when you are away (unless you have security cams/systems).
2. Disable UPnP on your router.
3. Make sure ALL your clients (computers, phones, printers, etc) have the latest updates, drivers, and firmware). Clients can cause more security issues than routers (i.e. KRACK).
4. If your router supports MAC filtering, enable it and only add your clients.
5. Disable guest mode if not using it. Most routers should have it off by default.
6. Change your admin, user, and wi-fi passwords often.
7. Make sure you are using WPA2 - AES only for your wi-fi encryption.
8. Turn on SPI and Anti-Spoof checking - usually in the Firewall section. Enable IPv6 simple security/ingress filtering if your router supports it. Also if you are not using a VPN on your network, disable IPSec and PPTP,
9. Be smart when opening emails and visiting websites. Try to use HTTPS.
10. Make sure your java/javascript is up-to-date. Go to java.com. If you have a 64-bit OS, make sure you are installing the 32-bit version first, then the 64-bit.
11. Make sure your antivirus is up to date on your computer and mobile devices. Avast has a "router" scan. It always says there may be a problem until you actually run the scan.
12. Enable CAPTCHA for your router login - Management > Admin on newer dlink routers.
13. Disable remote access if enabled.
Hope this helps.