Goodbye Patch Tuesday: Moving to Continuous Patch Management

• The monthly cycle is predictable. But the time between release day and deployment day leaves devices exposed.
• Continuous patch management turns patching from one window into a process that runs every day.
• Do not rely on the CVSS score alone for priority. Add exploitation status (KEV, EPSS) and asset criticality.
• Ring-based rollout (pilot, early, broad, critical) gives speed and safety together.
• Speed without a rollback plan is risky. Write the plan before you patch.
• Measure the process: mean time to patch and compliance rate are the two most important indicators.

Why is Patch Tuesday no longer enough on its own?

A patch is released on Tuesday. On the same day, researchers and attackers start to study which code the patch changed. A patch closes a vulnerability, but it also shows where the vulnerability was. Every day your device stays unpatched, that information works against you.

This article explains where the monthly patch cycle falls short, how continuous patch management works, and how your IT team can move to this model safely, step by step.

What is Patch Tuesday and why did it become standard?

Microsoft releases security updates on the second Tuesday of each month. This calendar made the work of IT teams easier. Teams could make a fixed plan for testing, approval, and deployment during the month. Restarts were also grouped into one period.

The main benefit of the calendar is predictability. Budget, staff, and maintenance windows are planned in advance. This is why the monthly cycle worked well for years. The problem is that the threat landscape does not follow this calendar.

The hidden costs of the monthly cycle

1. The exposure window

A device is unprotected during the time from release day to deployment day. Test and approval steps make this time longer. It can be a few days or a few weeks. In a monthly cycle, this time is structurally long.

2. Out-of-band releases

A vendor sometimes releases an urgent update. This update does not fit the monthly calendar. A team tied to the monthly plan either applies the urgent patch as a manual exception or leaves it for the next period. Both options are risky.

3. Third-party software

Browsers, PDF readers, and communication tools do not follow the Microsoft calendar. Each vendor releases updates on its own schedule. Teams that track operating system patches but keep application updates on a separate list miss this difference.

4. Remote devices

A laptop that never joins the office network can miss the deployment window. If the device stays off or offline during the month, the patch moves to the next period. This is common in hybrid work.

5. The load of one large rollout

Sending patches to all devices on the same day loads the network, the servers, and the users at once. If an error occurs, the effect spreads across the whole organisation. In small, continuous rollouts, an error stays limited to a small group.

Which steps in a vulnerability’s life cycle do you control?

Every vulnerability follows the same path. Some steps on this path are outside your control. Others are fully yours. Continuous patch management shortens the steps you control.

The last four steps are yours. The shorter these steps are, the narrower the exposure window is.

What is continuous patch management?

In continuous patch management, scanning, approval, and deployment are not a one-time event. The process runs every day. When a new patch appears, it goes to a pilot group first, then to the rest of the fleet in stages. Priority depends on the severity of the vulnerability and whether it is being exploited.

Common misunderstandings about continuous patch management

• “We must drop the monthly cycle completely.” No. Knowing the release calendar helps planning. What you drop is tying deployment to one window.
• “We must install every patch immediately.” No. The priority rule decides which patch goes now and which goes later.
• “A high CVSS score is the first vulnerability to patch.” Not always. CVSS measures technical severity. It does not measure the chance of exploitation.
• “Continuous patching means more downtime.” No. Small, spread-out rollouts can cause less downtime than one large restart.
• “This applies only to Windows.” No. macOS and Linux devices and third-party software must be in the same process.

How do you set patch priority?

Do not tie priority to a single score. Assess several signals together. Each signal has a limit.

CISA sets deadlines for US federal agencies to fix the vulnerabilities in the KEV catalog (BOD 22-01). It does not bind you. But you can use the list as a priority signal. CISA’s SSVC model also sets priority with decision points such as exploitation status and impact.

The target times below are examples. They are not a standard. Adapt them to your own risk appetite.

The ring-based rollout model

A ring is a method to split devices into groups by risk and impact. The patch goes to a small group first. If no problem occurs, it moves to the next group. NIST SP 800-40 Rev. 4 also recommends planning maintenance by asset group. The guide defines separate plans for routine patching, emergency patching, emergency mitigation, and assets that cannot be patched.

For an emergency patch, wait times get shorter. For example, for an actively exploited vulnerability, Ring 0 and Ring 1 can finish on the same day. Get the approval for the critical ring in advance.

Restarts and maintenance windows

Many patches need a restart. Use these rules to keep security without harming the user experience:

• Define a deadline for restarts. Show a warning to the user first. When the deadline ends, restart the device.
• Open the install window outside working hours. For laptops, install when the device starts.
• Use separate, announced maintenance windows for servers.
• Track devices that wait for a restart as a separate list. A patch that is not restarted is often a patch that is not applied.

Rollback and error handling

Speed creates risk without a rollback plan. Write the plan before you patch. The answers to these questions must be ready:

• At which criterion will you stop the rollout? Example: a startup error on two devices in the pilot ring.
• If a patch causes a problem, which steps do you apply? Patch removal, system restore, or a return from backup.
• Who reviews failed installs? Name the person responsible.
• Is there a temporary mitigation for a problematic patch? For example, turn off a service or add a rule.
• When did you last test the rollback path?

Third-party software and remote devices

Attackers do not target only the operating system. Browsers, PDF readers, and office applications are also common targets. Do not keep the patches for this software in a separate table. Track them in the same process as the operating system.

Two principles apply to remote devices. First, a device must be able to reach the management server over the internet, even when it is not on the office network. Second, a device that was offline must get the patch as soon as it comes online. Waiting for the end of the month is the largest weakness of the monthly cycle.

A 30-60-90 day transition plan

Do not change anything in the first 30 days. Only measure. Without knowing your current mean time to patch, you cannot show improvement.

What should you measure?

Compliance and audit

Patch management is a shared topic in many frameworks. ISO/IEC 27001:2022 Annex A defines the management of technical vulnerabilities as a separate control. KVKK Article 12 requires the data controller to take the necessary technical and administrative measures. PCI DSS 4.0 sets a one-month upper limit for critical security patches. Check the current text of your own standard.

In an audit, a policy is not enough. You need records that show the policy is applied. Continuous patch management helps here: each install leaves a task record, and you can produce a compliance report without waiting for the end of the month.

A sample patch policy

The list below is a starting point. Adapt it to your organisation.

• Scope: All Windows, macOS, and Linux devices and approved third-party software.
• Inventory: The device and software inventory is updated every day.
• Priority: Urgent, high, normal, and low classes are written with target times.
• Rings: Pilot, early, broad, and critical rings are defined.
• Restart: Users get a deadline. Servers restart in a maintenance window.
• Rollback: Stop criteria and rollback steps are documented.
• Exceptions: Each exception has an owner, a reason, and an end date.
• Reporting: Compliance rate and mean time to patch are reported monthly.

Common mistakes

• Starting to patch without an inventory. You cannot patch a device you do not see.
• Focusing only on the operating system and forgetting third-party software.
• Updating all devices at the same time. An error spreads across the whole organisation.
• Not tracking devices that wait for a restart.
• Not setting an end date for exceptions.
• Not reviewing failed tasks. A failed install often stays failed because nobody retries it.
• Looking only at the compliance rate. Even with a high rate, one critical device can stay exposed.

Continuous patch management with Moftgate

Moftgate manages operating system and third-party software updates on Windows, macOS, and Linux devices from one console. On Windows, the agent uses the Windows Update Agent. On macOS, it uses Apple’s built-in update tool. On Debian and Ubuntu, it uses the apt package manager.

• Visibility: The Updates tab of each device lists the pending OS patches and outdated software. The device list shows the number of pending updates as a badge.
• Automation policies: The policy target can be a group, a tag, or a single device. You choose the update type (OS patch, software, or both), the schedule (immediately, scheduled, or maintenance window), and the approval mode (manual or automatic). You can build your ring model with these fields.
• Tracked tasks: Each install creates a task. You see progress in Logs and the result in History. You can review a failed task and retry it.
• Bulk install: You can select several updates and install them together.
• Remediation from a CVE: On the Exposure screen, you open remediation from a CVE or a device. You choose the matching patch catalog update or a remediation script. The action is queued for the device.
• Offline devices: If the agent cannot reach the server, it stores data locally for up to 3 days and syncs when the connection returns.

The first 200 endpoints are free. You do not need to buy separate tools for patching, remote access, and inventory.

Conclusion

The Patch Tuesday calendar stays in place. What changes is your deployment speed. Staying tied to the monthly window makes the exposure time longer. Continuous patch management shortens this time safely with priority rules, ring-based rollout, and a rollback plan.

The first step is simple: measure your current mean time to patch. Then set up a pilot ring. To try Moftgate for free or to see the patch workflow in your own environment, schedule a demo.