Acunetix User Agreement
Those who use Acunetix Web Vulnerability Scanner are bound by the Acunetix End User License Agreement (EULA). This site was scanned by someone using Acunetix Web Vulnerability Scanner. This scan was NOT performed by Acunetix Ltd but by a user using our tool.
If you did not authorize this scan then you should check the source IP of the scan, and contact the owner or ISP hosting the IP address. That said, your best protection is to ensure your website is secure.