Which vulnerability does endpoint security address?

Endpoint security primarily focuses on preventing unauthorized access and protecting against malware attacks within a network. Endpoints, which include devices such as laptops, desktops, and mobile devices, are often targets for cyber threats because they serve as access points to sensitive data and corporate networks. By implementing various security measures such as firewalls, antivirus programs, and intrusion detection systems on endpoints, organizations can significantly mitigate the risks associated with unauthorized access and malware infections.

The other options highlight important security concerns, but they fall outside the primary focus of endpoint security. For instance, while physical theft of devices is a crucial issue, it relates more to physical security measures rather than cybersecurity mechanisms employed on endpoints. Data loss during backups deals with backup strategies and data integrity rather than endpoint-specific protections. Lastly, faulty hardware components are typically addressed through hardware maintenance and infrastructure management rather than through endpoint security solutions. Thus, the correct answer highlights the core function of endpoint security in safeguarding devices against malicious activities and unauthorized access.