Think Positive Cyber

On November 6, 2025, I watched Vulnerability Remediation – CompTIA Security+ (4.3) by Professor Messer. The lesson focused on how patch management is a continuous process, not a one-time fix. Scheduled patches deliver grouped updates, while unscheduled or “zero-day” patches address urgent vulnerabilities. Cybersecurity insurance can offset losses from downtime, phishing, or lawsuits—but it doesn’t protect against poor maintenance or negligence. The real goal is prevention, not payout.

Segmentation was another major theme. By dividing networks into VLANs or air-gapped environments, organizations limit how threats spread. Two switches with no interconnection form a physical air gap, while VLANs offer logical separation on shared hardware. Next-Generation Firewalls (NGFWs) filter traffic between these zones, blocking unnecessary communication. This layered approach is essential when patching isn’t immediately possible and systems must stay operational.

The video closed with the importance of validation and reporting. After every patch, systems must be rescanned to confirm the fix worked, and ongoing reports should track patched versus unpatched assets. Manual checks are impractical, so automated tools help ensure nothing slips through. Continuous monitoring, documentation, and compensating controls all combine to maintain resilience—even when full remediation takes time.