Our goal is to help you deliver the highest level of security to your Magento site. 

You now have access to a security scan tool that enables you to regularly monitor your sites and receive updates regarding known security risks, malware, and unauthorized access. It provides over 30 security tests to identify potential vulnerabilities, such as missing Magento patches, configuration issues, and failure to follow security best practices. Please be sure to set your site up for security scanning – activation is quick and easy. Access today in your Magento account.

You should also visit our Security Center which provides alerts around potential issues as well as best practices to help you protect your site against issues, such as brute force attacks. Brute-force password guessing attacks continue to target Magento Open Source (formerly Community Edition) sites worldwide and we have published an  article that explains multiple actions you can take to protect your site from such attacks. In some cases, these attacks have resulted in unauthorized administrative access, so it is important to implement these recommendations.

To visit the Magento Security Center:
www.magento.com/security

To view steps you can take to protect against issues like brute force, go to:
www.magento.com/security/best-practices/5-immediate-actions-protect-against-brute-force-attacks