What is patch management?

A software patch is a targeted code update released by vendors to fix security vulnerabilities, resolve bugs, or add new functionality. Patch management is the process of identifying, testing, and deploying these updates across your systems before attackers can exploit the flaws they address.

Once patches are deployed, teams validate installation success and track compliance rates to ensure nothing was missed. This validation step is critical because a patch that fails to install leaves the vulnerability wide open.

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Why is patch management important? Key benefits

Patch management can significantly impact your business by providing the following key benefits: 

Patch management vs. vulnerability management

Patch management applies vendor-issued fixes to close known security gaps. Vulnerability management is broader: it identifies all security weaknesses in your environment and determines how to address them, whether through patching, configuration changes, or compensating controls.

Not every vulnerability has a patch. Some require architectural changes, network segmentation, or temporary mitigations while you wait for a vendor fix. This is why patch management is a subset of vulnerability management rather than a replacement for it.

When a vulnerability is detected, the vulnerability management process comes into action, where it either triggers a patch management strategy to install a patch to the vulnerable software or implements a temporary fix to mitigate the risk. This means that patch management processes aren't enough to secure your system—you still need to consider other effective vulnerability management strategies to address every kind of security risk.

How it works: The patch management lifecycle

So, you’re ready to start your patch management regimen, but you’re not exactly sure where to start. The patch management lifecycle follows six steps, from building your asset inventory through documenting completed deployments. Each step builds on the previous one to create a repeatable process that keeps your systems protected without disrupting operations.

1. Develop inventory

Regularly updating inventories of assets—such as your remote and on-premises devices, operating systems, and third-party applications—is integral to monitoring your organization’s IT ecosystem. Once you have your full inventory, you’ll know what will need to be included in your regular patch regimen.

IT teams will often standardize the asset inventory by restricting employees to specific hardware and software versions they can use. Standardizing this way not only helps make the patching process simpler and more efficient, it also promotes a better security posture, as it prevents employees from accessing and using outdated and unsafe apps or devices.

2. Identify patches

Once the security and IT teams have updated and completed the asset inventory, they can start finding available patches for everything on the list, track the current patch status of assets, and identify assets with missing patches.

3. Classify and prioritize patches

Not all patches carry equal urgency. A security update addressing an actively exploited vulnerability in a production system takes precedence over a feature enhancement that can wait for the next maintenance window.

Use threat intelligence and vulnerability management tools to identify which patches address the highest-risk issues. Focus on vulnerabilities that are externally exposed, have known exploits, or affect critical systems, especially since threat actors target external-facing vulnerable services. This risk-based approach concentrates your effort where it matters most and reduces the likelihood that an unpatched flaw leads to downtime or a breach.

4. Test patches

Testing patches before production deployment catches compatibility issues, performance problems, and installation failures before they affect your users. A patch that breaks a critical application or fails to install properly can cause more disruption than the vulnerability it was meant to fix.

Test patches in a lab environment that mirrors your production configuration. If a full staging environment is not available, deploy first to a small group of non-critical systems and monitor for issues before broader rollout. This validation step protects against both technical failures and the rare but serious risk of supply chain attacks, where malicious code is delivered through what appears to be a legitimate update.

5. Deploy patches

Once you’ve prioritized which patches need to be deployed first, the next step is to deploy the patches to  the risk in your environment. 

Part of effective patch deployment is deciding  when patches will be deployed. Patching is usually done during time periods when no or very few employees are working, to reduce risk and the general inconvenience. Vendor patch releases can sometimes hamper the schedule of patching, so be mindful of this.

6. Document the patching process

The last step in the patch management lifecycle is to document the patching process. You'll want to have a way to record all of the test results, the schedule, how the roll out was implemented, and list any unpatched assets that still need followup. This documentation helps IT teams both keep the asset inventory up to date and stay on top of compliance, as some regulations require such records be kept for audits.

Patch management best practices

Now that you've seen the steps involved in the patch management process, here are some of the best practices that you can adhere to along the way.

1. Have accountability and expectations for teams

Patching stalls when no one owns the process. Security teams may identify critical vulnerabilities, but if IT operations is not aligned on remediation timelines, patches sit in queues while exposure grows.

Define clear ownership for each stage: who identifies patches, who tests them, who approves deployment, and who validates completion. Establish SLAs that specify how quickly different severity levels must be addressed, and review these metrics with leadership to maintain accountability.

2. Have emergency patch procedures in place

Zero-day vulnerabilities and actively exploited flaws require immediate action outside your normal patching schedule. Without a predefined emergency procedure, teams waste critical time debating approval chains while exposure continues.

Your emergency patching procedure should specify who can authorize out-of-band deployments, what testing can be abbreviated under time pressure, and how to roll back if the patch causes unexpected failures. Document this process before you need it so teams can execute quickly when a critical vulnerability emerges.

3. Good collaboration between technical teams

Security teams and IT teams often have different priorities and terms for software errors. Patches usually are released by vendors so they sit high on the priority list for the security team, however, IT teams may prioritize system operations over security patches. Which one of them gets to have it their way?

Ensuring that everyone on the team recognizes the importance of patching and is on the same page regarding security is integral to effective patch management.

4. Automate the patch management process

Manually identifying, testing, and deploying patches is a tedious, time-consuming, and error-prone process. Automating the patch management process not only makes the patch deployment easy but also fast and accurate.

Automated processes can detect assets with missing patches, critical vulnerabilities, and newly available patches, and install them on respective endpoints.

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Common patch management challenges

Patch management can be complex, but addressing common challenges directly improves efficiency and strengthens security. Here’s how to handle the key obstacles effectively:

Keeping up with patch releases

Tracking patch updates from multiple vendors is a constant challenge. Frequent releases and varying sources make it easy to miss critical updates, leaving systems exposed. To stay informed, implement automated tools that deliver real-time alerts for new patches or subscribe to vendor notification systems. These strategies ensure you consistently address updates promptly and avoid gaps in coverage.

Balancing downtime and deployment

Deploying patches quickly is essential for security, but downtime during updates can disrupt operations. To balance these priorities, schedule patch deployments during planned maintenance windows. For larger updates, use phased rollouts to minimize risks and ensure systems remain operational while updates are applied incrementally.

Ensuring comprehensive coverage

Overlooked or unaccounted-for systems, such as legacy applications or shadow IT, create vulnerabilities in your patching strategy. Use asset discovery tools to identify all systems in your environment, ensuring no critical assets are missed. Comprehensive visibility allows for consistent updates and reduces the likelihood of exploitable gaps.

Prioritizing critical updates

Some patches require immediate attention due to the risks they mitigate. Focus first on updates addressing high-risk vulnerabilities or protecting critical systems. Risk-based vulnerability management tools can help you identify and prioritize patches based on their potential impact and urgency, enabling a targeted and efficient approach to patching.

Exploring patch management tools

Patch management tools automate the discovery, testing, and deployment of updates across your environment. They pull patch information from multiple vendors, track which systems are missing updates, and orchestrate rollouts based on your defined policies.

The right tool reduces manual tracking effort and ensures patches deploy consistently across all systems. When evaluating options, prioritize these capabilities:

• Real-time patch tracking to monitor updates from multiple vendors.

• Risk-based prioritization to focus on the most critical vulnerabilities.

• Integration capabilities to align with your existing workflows.

• Asset discovery tools to ensure every system, including hidden ones, is patched.

For broader vulnerability management, Wiz provides a solution that pairs agentless scanning with smart prioritization, helping you not just manage patches but address security gaps at their core.

Wiz's approach to patch management

Knowing which vulnerabilities exist is only half the problem. The harder question is which ones to patch first when you have hundreds of findings and limited maintenance windows.

Wiz scans your cloud environment without requiring agents, identifying vulnerabilities across VMs, containers, and serverless workloads. More importantly, Wiz UVM shows you which vulnerabilities are actually exploitable by correlating them with external exposure, identity permissions, and network reachability. This context lets you focus patching effort on the issues that represent real risk rather than chasing every CVE in your environment.

Ready to see which vulnerabilities in your environment actually matter? Get a demo to learn how Wiz helps teams prioritize patches based on exploitability, not just severity scores.

Contextual risk-based vulnerability prioritization

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