Analyze the Timeframe: The request is to identify a server that must be patched within 14 calendar days. According to the "Vulnerability remediation timeframes" policy, this specific timeframe applies to vulnerabilities with a CVSS score between 7.9 and 9.0 that affect the Production (PROD) environment.

Eliminate Incorrect Options:

• The "Output" tab shows two fully detailed vulnerabilities on servers 192.168.76.5 (CVSS 9.2) and 192.168.76.6 (CVSS 7.4).
• Based on the "Environment" tab, both of these servers are in the 192.168.76.0/24 subnet, which belongs to the Development (DEV) environment.
• The remediation policy explicitly states that these timeframes do not apply to the DEV environment. Furthermore, their CVSS scores (9.2 and 7.4) do not fall within the 14-day remediation window (7.9-9.0). Therefore, neither of these servers is the correct choice.

Identify the Correct Server and Vulnerability:

• The list of selectable servers includes 192.168.60.5 and 192.168.60.6. The "Environment" tab confirms these IPs are part of the PROD environment (192.168.60.0/24).
• This implies that a third, partially-visible vulnerability in the "Output" tab—"Untrusted SSL/TLS Server X.509 certificate"—affects one of these PROD servers and has a CVSS score that falls within the 7.9-9.0 range, mandating a 14-day fix.
• The most appropriate mitigation for an untrusted SSL/TLS certificate is to replace it with a valid certificate issued by a reputable Certificate Authority (CA).

Select the Correct Mitigation: The option "Patch; upload signed certificate from trusted third-party provider" directly addresses the "Untrusted SSL/TLS Server X.509 certificate" vulnerability.

National Institute of Standards and Technology (NIST). (2013). Guide to Enterprise Patch Management Technologies (Special Publication 800-40r3). Section 2.2, "Patch Management Policy," discusses the importance of creating policies that specify remediation timeframes based on vulnerability severity.

Mell, P., & Scarfone, K. (2011). The Common Vulnerability Scoring System (CVSS) and Its Applicability to Federal Agency Systems (NISTIR 7435). This document details how CVSS scores are used to assess and prioritize vulnerabilities, forming the basis for remediation policies like the one shown.

The Open Web Application Security Project (OWASP). Transport Layer Protection Cheat Sheet. This resource explains the risks associated with improper TLS configuration, including the use of untrusted certificates, and recommends using valid certificates from trusted CAs as a primary control. (Available at owasp.org).