Microsoft SharePoint is prone to multiple remote code-execution vulnerabilities. An attacker can leverage these issues to execute arbitrary code in the context of the W3WP service account user.
Run all software as a nonprivileged user with minimal access rights.
To reduce the impact of latent vulnerabilities, always run nonadministrative software as an unprivileged user with minimal access rights.
Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Deploy NIDS to monitor network traffic for signs of suspicious or anomalous activity. This may help detect malicious actions that an attacker may take after successfully exploiting vulnerabilities in applications. Review all applicable logs regularly.
Updates are available. Please see the references or vendor advisory for more information.