Patch management best practices come down to five habits: keep an accurate inventory, prioritize vulnerabilities by risk rather than release date, deploy through staged testing rings, meet defined patch timelines, and report compliance with clear exceptions. Unpatched software remains one of the most common entry points for attackers, so a reliable, measurable process matters more than any single tool.
Key Takeaways
- You cannot patch what you do not know exists, so start with inventory.
- Prioritize actively exploited and internet-facing vulnerabilities first.
- Use deployment rings: pilot, broad and critical systems.
- Set patch SLAs by severity and track them.
- Third-party applications and firmware need patching too, not only Windows.
The Patch Management Process
- Inventory: list all devices, servers, operating systems and applications.
- Monitor: track vendor releases and vulnerability advisories.
- Assess and prioritize: use severity, exploitability (such as CISA’s Known Exploited Vulnerabilities catalog) and asset criticality.
- Test: deploy to a pilot ring and check business apps.
- Deploy: roll out in rings with maintenance windows.
- Verify: confirm installation and remediate failures.
- Report: measure compliance and document exceptions.
Example Patch SLAs
| Severity | Example target |
|---|---|
| Actively exploited / critical internet-facing | As fast as possible, often within days |
| Critical | Within 14 days |
| High | Within 30 days |
| Medium / low | Next scheduled cycle |
Adjust targets to your risk appetite, compliance requirements and customer contracts.
Using Deployment Rings
- Ring 0 – IT pilot: immediate deployment.
- Ring 1 – early adopters: representative users across departments.
- Ring 2 – broad: the majority of devices.
- Ring 3 – critical: sensitive systems with change control.
In Microsoft environments, Windows Update for Business policies in Intune and Windows Autopatch make rings easy to manage. Compare tooling in our Intune vs SCCM guide.
Do Not Forget
- Third-party apps: browsers, PDF readers, Java, collaboration tools.
- Servers, hypervisors and network devices.
- Firmware and BIOS updates.
- Cloud workloads in Azure.
- End-of-support systems that no longer receive patches, such as Windows 10 without ESU.
Measuring Success
- Percentage of devices compliant within SLA.
- Mean time to remediate critical vulnerabilities.
- Number of open exceptions and their age.
- Exposure score trends from Defender Vulnerability Management.
Handling Exceptions
When a patch cannot be applied, document the reason, compensating controls (such as isolation or blocking a service), an owner and an expiry date. Review exceptions monthly.
Short on internal capacity? A co-managed IT model lets your team keep control of priorities while a partner handles patching and reporting at scale.
How Skytech Enterprise Helps
Our patch and vulnerability management service delivers ring-based patching, third-party updates and monthly compliance reporting, alongside Intune endpoint management. Talk to our team.
Frequently Asked Questions
How often should patches be applied?
Most organizations follow a monthly cycle aligned to vendor releases, with emergency patching for critical or actively exploited vulnerabilities.
What is the difference between patch management and vulnerability management?
Patch management deploys updates. Vulnerability management identifies, prioritizes and tracks all weaknesses, including those fixed by configuration changes rather than patches.
What is Windows Autopatch?
Windows Autopatch is a Microsoft service that automates updates for Windows, Microsoft 365 Apps, Edge and Teams using deployment rings.
Should servers be patched automatically?
Many servers can be patched automatically within maintenance windows, but critical systems usually require testing and change approval.
How do we patch remote devices?
Cloud-based tools like Intune deliver updates over the internet without VPN, which is ideal for remote and hybrid workers.
Do auditors check patching?
Yes. SOC 2, ISO 27001, HIPAA, PCI DSS and cyber insurers commonly ask for patching policies and evidence of timely remediation.