Patch management: how to keep updates under control without stopping work

Unpatched systems are one of the most common ways in. A simple monthly process that keeps servers, PCs and devices up to date.

Most successful attacks use vulnerabilities that already have a fix. The problem is not the lack of patches but the lack of a process: updates are postponed, forgotten or installed only on some machines. A clear routine solves this.

A simple monthly cycle

  1. Inventory. Keep a list of all servers, computers, network devices and important applications with their versions.
  2. Prioritize. Internet-facing systems (VPN, firewalls, mail, websites) and vulnerabilities known to be exploited come first — within days, not weeks.
  3. Test. Install updates on a test group or a copy of critical systems before rolling them out.
  4. Deploy in agreed maintenance windows, so users know when reboots happen.
  5. Verify that the update really installed, and record the result.

Do not forget

  • Firmware of firewalls, routers, switches, NAS and printers.
  • Third-party software: browsers, PDF readers, Java, accounting programs.
  • Systems that are out of support — they need a replacement plan, because no more fixes will come.

Patching is not a project, it is a habit. Small and regular beats big and rare.

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