A security analyst sees the following log output while reviewing web logs:

Which of the following mitigation strategies would be BEST to prevent this attack from being successful?

After reading a security bulletin, a network security manager is concerned that a malicious actor may have breached the network using the same software flaw. The exploit code is publicly available and has been reported as being used against other industries in the same vertical. Which of the following should the network security manager consult FIRST to determine a priority list for forensic review?