Every operating system has flaws. It does not matter whether your organization runs Windows, macOS, or Linux across its servers, desktops, laptops, and workstations. Software is written by humans, and humans make mistakes.
OS patching is the process of correcting those mistakes through timely deployments of updates and patches, so your devices stay secure, stable, and out of reach of hackers who make a living exploiting them.
Yet, many organizations struggle to consistently keep each OS updated for one reason or another. And the undeniable truth is that this can have a disastrous effect. A single unpatched vulnerability, if exploited, can not only cause significant downtime, costly fines, and reputational damage, but in the worst case, shut your business down for good.
At the same time, these risks can be minimized by automating OS patching with an autonomous endpoint management platform like Action1. With it, you can turn patch management into a set-it-and-forget-it process, helping you keep your systems up-to-date with minimal manual effort.
In this article, we will discuss what OS patching is, why it matters, whether manual patching is a good practice or your worst nightmare, and how automated solutions can eliminate the stress, reduce risks, and keep your systems secure.
We will also cover the consequences organizations face when patching is delayed or ignored, how to manage OS patches effectively through proven best practices, and why testing is crucial before rolling them out across your entire network.
What Is OS Patching?
OS patching is the process of applying updates and patches to an operating system like Windows, macOS, or Linux to address critical security vulnerabilities, fix bugs and software defects, improve overall system performance, and introduce the latest software features and functionality.
Nowadays, IT teams deploy updates manually or automatically via patch managers with the main goal of securing their systems against potential cyberattacks, maintaining regulatory compliance, and boosting business continuity.
Why Is OS Patching Critical?
An endpoint running the latest OS version is less likely to be hacked (except when a zero-day vulnerability is involved), experience software bugs, glitches, or become unresponsive. On top of that, it will never land you in regulatory trouble. And no, having XDR, EDR, or other security tools does not eliminate the need for patching.
To put it simply, here is what you gain when every endpoint across your network is up-to-date:
- Stronger security: An OS running the latest version is free of known security flaws. All code imperfections are fixed, so cybercriminals can’t use them for unauthorized code execution, malware deployment, credential theft, and system compromise.
- Maximized uptime: Fewer software crashes, bugs, or emergency patch deployments directly boost your business continuity.
- Easier compliance: Endpoints with up-to-date operating systems will never be the reason you fail an audit. You can easily prove compliance by providing reports containing information about patch cycles, covered systems, dates, and timestamps, as required by HIPAA, DORA, GDPR, and other regulatory frameworks.
- Cost savings: The global average cost of a data breach is approximately $4.44 million to $4.88 million per incident. Regular patching is one of the most cost-effective ways to make sure you never have to pay that price.
- New features and greater compatibility: Updates deliver the newest features to the operating system, which can improve your user experience or even ensure compatibility with different hardware or software.
What Happens If You Don’t Patch Your OS?
If you decide to run your operating system on an outdated version, you risk falling victim to a cyberattack. But that’s just the start of the domino effect leading to indefinite downtime, regulatory investigations, financial penalties, legal repercussions, a reputation in pieces, and clients you will never win back.
According to the Ponemon Institute, unpatched vulnerabilities are directly responsible for 60% of all data breaches, demonstrating how missing patches give attackers exactly the opening they need.
For example, the MOVEit vulnerability was first exploited in the wild on May 27, 2023, and affected thousands of organizations and almost 100 million individuals. It remains one of the most widespread supply chain attacks in history.
Fortinet’s CVE-2023-48788 case proves that even enterprise-grade systems are not safe when patches are delayed. During this incident, adversaries exploited a critical SQL injection vulnerability in FortiClient enterprise management servers to install unauthorized remote management and monitoring tools and PowerShell backdoors, ultimately gaining the ability to execute system-level commands on unpatched servers.
Change Healthcare is perhaps the most expensive lesson in what delayed patching actually costs. This ransomware attack on the UnitedHealth-owned prescription processor compromised and leaked the data of approximately 193 million individuals. As a consequence, over 24 lawsuits were consolidated into a class action. On top of that, the company was forced to pay a $22 million Bitcoin ransom to the ALPHV/BlackCat ransomware group.
Costs exceeded a mind-blowing $2.45 billion, with 94% of U.S. hospitals reporting financial damage and 80% of providers losing revenue from unpaid claims. Things escalated and federal investigations followed. Can you even imagine the scale of this attack? A single unpatched vulnerability brought an entire healthcare industry to its knees.
More recently, in April 2025, SK Telecom, South Korea’s largest mobile carrier, experienced a major breach after operating systems with known vulnerabilities dating back to 2016 were left unpatched. Hackers gained access to the SIM card data of almost 23 million subscribers, and this could have been prevented by simply applying patches on time.
Regulators fined the company $97 million, but the damage did not stop there. Their reputation took a serious hit, leading to a 90% drop in operating profit. SK Telecom committed over $500 million to rebuild its security infrastructure.
With these statistics, we do not aim to scare you, but to make one thing clear. No organization, regardless of its size or operating industry, can afford to neglect or delay timely patching. We cannot stress enough how quickly things can escalate, starting with just one unaddressed software vulnerability.
Manual vs Automated Patch Management
The choice between manual and automated patch management determines how effectively your team manages patches and addresses security vulnerabilities across your infrastructure.
Manual OS Patch Management
Every software update requires manual approval before it can be installed. In that case, you or your IT team must search for, download, test patches, and install them manually across every single endpoint. It definitely gives you complete control over when and how your operating system receives security patches, but it is a resource- and labor-intensive process. Repeating it week after week increases the chances of getting overwhelmed, making unintentional mistakes, leaving blind spots, and experiencing prolonged downtime.
Pros:
- Your team maintains complete control over when and how to install updates across production systems.
- You can test patches thoroughly before deploying them, which prevents software compatibility issues that might cause decreased system performance.
- This method allows you to visit vendor sites directly, verify software file authenticity, and schedule installations during planned maintenance windows without affecting system availability.
Cons:
- Manually patching your systems is time-consuming and error-prone. With the constant release of new updates, you or your IT team will face difficulties deploying every single patch across multiple servers and endpoints.
- Your organization remains exposed to security vulnerabilities longer, potentially allowing cybercriminals to exploit still unpatched systems.
- You can easily lose track of which systems are updated and which are not, especially if you are not creating reports after each patch cycle.
- Your organization faces a higher risk of regulatory fines due to the inability to monitor endpoints in real-time.
- You or your IT team must spend hundreds of hours annually just patching systems. “Manual” does not mean “cheaper.”
Automated OS Patch Management
Patches are deployed automatically with minimal human intervention because a third-party patch management platform handles the process end to end. Such software takes care of all the processes including vulnerability identification, missing OS patch detection, testing, scheduling, and deployment. It minimizes the remediation time and your attack surface, giving hackers much less time to exploit known vulnerabilities.
Pros:
- Automated patching deploys security updates, bug fixes, and feature updates way faster compared to manual patching.
- Your team can minimize security risks by automatically downloading, testing, and deploying OS patches. Once the automation is configured, it updates your systems regularly on schedule, eliminating repetitive tasks.
- You get complete visibility across your endpoints with real-time patch, compliance, and hardware status information, making asset inventory management significantly easier.
- You can ensure consistent patching processes across all network devices, reducing administrative burden while keeping your systems up-to-date.
- You or just one member of your team can manage thousands of endpoints across your entire network, regardless of whether they are on-premises or remote.
- You can reduce downtime risks through features like update rings for automated and reliable staged deployments.
- Keeping operating systems (OS) and third-party applications up-to-date guarantees that your company adheres to strict regulatory frameworks, eliminating the chance of facing costly fines and penalties.
Cons:
- Patch management programs come with hefty price tags that can strain your IT budget, especially for smaller businesses that need enterprise-level features but cannot afford the premium costs. Action1 is the only vendor that offers a free tier for up to 200 endpoints, with no feature limits, forever.
- Some patch managers require additional hardware investment, while others take time to learn and master.
OS Patch Management Best Practices
To effectively protect your systems, you need the right patch management strategy for your organization. Knowing why patch management is important is only the first step. Executing it correctly is what actually makes the difference.
There is no universal one-size-fits-all approach that magically aligns with every environment. So you need to apply the best practices in a way that fits your company’s specifications. OS patching can either help you remediate vulnerabilities and improve device performance, or introduce new issues and bring you some serious headaches.
What follows are selected best practices that, if used correctly, can streamline patch management and make it as effective as possible in protecting your endpoints and your business as a whole.
- Build a Patch Management Policy
First of all, you have to identify which systems fall under the scope, what operating systems and third-party apps are used on each endpoint, and who will manage the process (one admin or a whole team). You also need to know how often and when patches are going to be applied, how long the monitoring period will be, and whether you will generate detailed reports after the deployment or after the monitoring window.
Your patch management policy must be tightly tailored to your company’s environment, specific requirements, and operational needs. Without defined roles, timelines, and all the aforementioned aspects, you are doomed to lose track and leave your systems exposed to critical vulnerabilities.
- Equip Your Team with a Reliable Patch Management Tool
You need an effective patch management program if you want to protect your endpoints and keep them up-to-date and compliant with almost no manual effort. And that is a fact. It is best to pick one that is cloud-native, because it is easy to set up and requires no additional infrastructure or VPN. These platforms help you automate the entire patch management lifecycle, from vulnerability identification to remediation and report generation.
They identify existing vulnerabilities, list missing patches, allow you to schedule testing and deployment, and generate detailed audit reports with just a few clicks. You and your team get real-time visibility into each of your endpoints and their compliance and patch status, alongside detailed hardware information and whether each device is currently online or offline.
Do yourself a solid and pick a reliable patch manager that offers cross-platform OS support and broad third-party application coverage. This way you will have the flexibility to simultaneously deploy updates across different operating systems with a single automation.
- Use Risk-Based Patch Prioritization
Security patches are released with the goal of addressing software vulnerabilities. However, the thing is that each flaw poses a different risk to your organization, so you have to prioritize them correctly. You can use vulnerability management tools to assess which of them pose the greatest threat and take action to remediate them first.
Keep in mind that most patch management solutions offer built-in vulnerability prioritization, so if you are using one, you will see patches prioritized based on the severity of the flaw they are fixing. These flaws fall into four severity categories:
- Critical (CVSS score 9.0-10.0): Immediate action required.
- High (CVSS score 7.0-8.9): High priority, patch as soon as possible.
- Medium (CVSS score 4.0-6.9): Patch based on available resources.
- Low (CVSS score 0.1-3.9): Patch within the next maintenance window.
- Schedule Regular Patch Cycles
Your patch management process should follow a consistent schedule like this:
Regular maintenance window: It must be scheduled weekly, bi-weekly, or monthly at the exact same time. For Windows environments, aligning your regular maintenance window with Patch Tuesday is a great practice. Our recommendation is to do that outside business hours, like evenings or weekends, to avoid operational disruption risks. If that is impossible, make sure all of your employees know exactly when it is scheduled, so they can save their work and avoid the inconvenience of losing data or being unable to complete their tasks.
Emergency maintenance window: It will be triggered only when a critical vulnerability exists that is being actively exploited and cannot wait for your next scheduled maintenance window. In such instances, you may have to interrupt normal business operations for a couple of hours to deploy the patch, but that is better than experiencing the devastating consequences of a successful cyberattack that might take you weeks or months to recover from.
This hybrid approach gives you the peace of mind that whatever the situation, you have the flexibility to act properly and protect your systems.
- Always Test Patches Before Deployment
Never roll out updates organization-wide without testing them first on a small group of endpoints (1-10%). Start with test endpoints, move to non-critical production systems (10-40%), and only then extend to business-critical devices (40-100%). This staged approach ensures that a problematic patch never reaches your most important systems before you have had the chance to catch it.
Our recommendation is to look for patch management software that offers the update rings feature, which enables phased and autonomous patch rollouts, advancing updates from inner to outer rings based on success metrics. Qualified patches move forward automatically, reducing downtime risk while ensuring timely vulnerability remediation.
Sometimes OS patches can cause system instability, compatibility issues, failure to start the system, slower operations, and other software errors that directly impact your productivity. Say you roll out a problematic patch and every single one of your devices gets affected. We have all seen this movie, and it ends up with a lot of headaches and overtime.
But with a patch testing first approach, you will catch these problems early and only have to fix up to 10% of your systems. So never underestimate the importance of testing.
- Implement Patch Rollback Procedures
Even if you use a staged automated patch deployment approach, a particular update may work perfectly in the testing ring but break the workflow of your production systems. It happens from time to time.
And that is exactly why you need a clear rollback plan before you start patching. The easiest and most efficient way is to use the one-click rollback capability that many patch managers offer. With this feature, you will be able to uninstall the faulty patch, restore affected systems, and get things back to normal.
- Create snapshots or full backups before patching
One thing should be top of mind before every patch cycle. Snapshots and backups are your plan B, your life-saving option during emergency situations. Just remember that snapshots are the preferred method for virtual machines, while full backups are preferred for physical endpoints. With them in place, you or your team can confidently patch without fear of permanent damage or prolonged downtime.
- Monitoring and report generation
Keep detailed records of every patch deployed, when it was installed, which systems were affected, and any issues encountered. Monitor your systems for 24 to 48 hours after each deployment to confirm that system integrity is maintained, everything works as expected, and any missing patches or failed updates are caught early.
Maintaining detailed audit logs is highly important for troubleshooting, compliance audits, and building a reliable chronological patching history. With a tool like Action1, you get immediate alerts for both successful and failed update installations, giving you 360-degree visibility across your entire network. Plus, you can use more than 100 customizable report templates to generate detailed documentation with just a few clicks after each update.
Why Is Third-Party OS Patching Software a Must for Any Business?
Third-party OS patching software is a critical component of your cybersecurity toolkit, providing everything you need to improve your security posture, maintain operational stability, address software vulnerabilities on time, and generate detailed reports from a single dashboard.
If you are still relying on software with limited functionality, like Windows Update, or still manually patching your devices, that’s a waste of time, money, and resources. Patching that is done manually or incorrectly feels like watching a dog chasing its tail.
Let’s break down the key benefits you get when you stop doing it the hard way:
Centralized Management Across Multiple Systems
Third-party OS patching tools provide your IT team with complete control over when and how they deploy updates across on-premises and remote devices. One of the biggest advantages of patch managers is that a single administrator can keep tens of thousands of endpoints updated and closely monitored.
From a single console, your team can keep all of your organization’s systems up-to-date, schedule deployments at convenient times to avoid downtime, and significantly reduce the attack surface while minimizing the chance of vulnerability exploitation.
Enhanced Security and Vulnerability Management
Nowadays, a large percentage of cyberattacks succeed by exploiting known software vulnerabilities in unprotected endpoints. Luckily, professional patch management platforms offer vulnerability management and remediation capabilities that successfully narrow the time between flaw identification and remediation.
Through continuous vulnerability scanning, they identify every outdated or unprotected OS and third-party application across your endpoints, prioritize the flaws based on CVE numbers, CVSS scores, and active exploitation indicators from the CISA catalog, and even flag vulnerabilities used in known ransomware campaigns.
They do not rely on a single source. Instead, they pull information from many trusted sources like VulnCheck, NIST NVD, CISA KEV, MSRC, and vendor release notes. That results in a far more accurate picture of your exposure than any single-source solution can deliver.
But that’s not all. These platforms offer built-in remediation capabilities that allow you to effortlessly apply available patches, remove unsupported or legacy software, or centralize documentation of compensating controls for flaws that cannot be patched at all.
A dedicated dashboard with SLA-based tracking keeps your eyes wide open for new security gaps and active vulnerabilities against defined resolution timelines.
Business Continuity and Risk Reduction
Automated OS patch management, apart from fixing vulnerabilities and bugs, delivers something way more important. It keeps your business online, your employees productive, and, of course, your clients happy. With efficient rollback capabilities, flexible scheduling, and automated processes like staged deployments, the risk of downtime, compatibility issues, or other disruptions caused by faulty patches is reduced to its lowest point.
Other than that, by continuously closing security gaps before attackers can exploit them, automated patch management directly reduces the likelihood of a breach that could take your business offline for days or even weeks. At the end of the day, this kind of risk reduction protects not just your systems but also your revenue, your customers, and most importantly, your reputation.
Compliance and Reporting
You can generate audit-ready reports and prove that each and every endpoint across your network is up-to-date and free of known software flaws. Patch managers offer built-in templates that you can customize according to your or your clients’ needs, helping you meet regulatory requirements without the manual paperwork nightmare.
Today, you do not need to spend hours manually compiling patch reports. You get automated dashboards showing compliance percentages, identified and addressed flaws, remediation progress, and many other critical metrics.
This kind of documentation can be used not only to show you are compliant with regulations, but also to help your security team track improvement over time and prove to leadership that your patch management efforts are actually paying off.
Action1 is the Perfect Software for Operating System Patch Management
Action1 is a cloud-native patch management platform that completely automates the patching process for Windows OS, macOS, Linux, and third-party applications. The software is infinitely scalable, making it a perfect choice for businesses of all sizes.
Once installed, which takes up to 5 minutes, Action1 automatically detects every known vulnerability across your on-premises and remote endpoints (note that an agent must be installed on each device you want to manage) and prioritizes them based on CVSS scores and likelihood of exploitation, using data from the CISA KEV catalog.
Right after that, on the dashboard, you will see a list of all missing patches and updates across your operating systems and third-party apps. All patches are sourced from a private, secure software repository, and P2P distribution ensures they reach every endpoint quickly without putting strain on your network bandwidth.
From here, you can configure your automated deployment exactly the way you want it using the update rings feature. You create your endpoint groups, set your success rates and deployment counts for each ring, and Action1 takes care of the rest automatically. This autonomous approach ensures that patches are regularly validated, reducing the risk of failures and unexpected downtime caused by problematic patches.
With flexible scheduling options, you or your IT team can create maintenance windows at convenient times, during weekends, or outside business hours to avoid disrupting business continuity. Also, you can specify whether the updated endpoints should reboot immediately or not.
On top of that, software update approvals can be managed at the organizational level, rather than uniformly across the entire enterprise, allowing you to approve, hold, or decline updates for each unit, client, or department within the Action1 platform.
After completing the patch deployment process, you can generate detailed audit-ready reports in minutes by using the 100+ customizable built-in report templates.
Action1 is highly secure enterprise patch management software that is certified for SOC 2 Type II, ISO 27001, TX-RAMP, CSA, CISA Secure by Design, CAIQ, and GDPR. And the best part? You can use the platform free for up to 200 endpoints with no feature limits, forever, and scale seamlessly when needed. In other words, Action1 keeps your endpoints up-to-date, saves you time and money, and reduces the risk of experiencing cyberattacks launched through vulnerability exploitation.
Make the smart move and start using Action1 to improve your organization’s overall security posture by automatically patching all your on-premises and remote endpoints. While cybercriminals won’t like it, your IT team will definitely love having a patching solution that just works.
What are the main types of OS patches?
The main types of OS patches are security patches, bug fix patches, feature updates, and hotfixes. Security patches are released by software vendors to address vulnerabilities and prevent their exploitation by hackers, making them the highest priority in any patch management strategy. Bug fix patches maintain the stability of your OS by resolving glitches and software defects that affect system performance.
Feature updates add new functionality or improve existing capabilities and carry the lowest urgency from a security standpoint. Hotfixes are emergency patches released outside the regular patch cycle to address a critical vulnerability or severe bug that cannot wait for the next scheduled update window.
How often should you patch your operating system?
Critical patches (security ones) must be installed within 24 to 48 hours of their release to remediate actively exploited OS flaws. Non-critical patches like bug fixes, feature updates, or even security patches fixing low-priority vulnerabilities can be scheduled for deployment during your next maintenance window (ideally within 14 days).
Is there a free automated OS patching platform?
Yes, Action1 is free for up to 200 endpoints, with no feature limits, forever. It can be used across Windows, macOS, and Linux-based endpoints. Plus, it comes with broad coverage of third-party applications.
Some of the key features it offers are asset management, scheduled deployments, update rings, update approval and decline per organization, private software repository, security controls (MFA, RBAC, and more), P2P patch distribution, real-time endpoint visibility, built-in vulnerability management and remediation.
Is it safe to automate OS patching?
Yes, absolutely. By automating OS patching, you ensure that new patches will be deployed immediately or on schedule according to your preferences. In fact, patch management platforms are safer than manual patching because they offer staged rollouts, support patch testing environments, eliminate the human error factor, provide rollback capabilities, and deploy patches to your critical systems faster.
Takeaways
OS patching is one of the most important security practices you have to master to perfection to make your IT environment secure, stable, and compliant with strict regulatory frameworks. Patches, whether they are security patches, bug fixes, feature updates, or hotfixes, are all important, even if not equally so. Deploying them in a timely manner will help you avoid cyberattacks and unexpected downtime, and even improve your endpoints’ performance.
Unpatched vulnerabilities in your operating systems and third-party applications are one of the most frequent reasons organizations like yours suffer security breaches, ransomware attacks, and malware infections. Then regulatory fines, downtime, damaged reputation, a shrinking client base, and in some cases a business shutdown follow. The Ponemon Institute confirms it. The MOVEit breach, Change Healthcare, and SK Telecom prove it with billions of dollars in damages and millions of affected individuals.
Luckily, with the right OS patching strategy, you can minimize the chance of experiencing any of the aforementioned disastrous scenarios. With best practices like risk-based prioritization, regular patch cycles, staged rollouts, pre-deployment testing, and detailed compliance reporting, this is achievable. Done manually, this continuous process quickly becomes a nightmare. It takes forever, drains your team, and even worse, leaves critical gaps.
Done with the right patch management platform, it becomes a fully automated, streamlined, reliable, and nearly hands-free process. Consistent patch management ensures every endpoint across your network stays protected, compliant, and performing at its best. Action1 checks all the boxes. It is a cloud-native, easy-to-set-up, free for up to 200 endpoints (fully featured, forever, no credit card required) autonomous endpoint management platform.
With Action1, you can patch your Windows, macOS, and Linux-based endpoints, alongside their third-party applications. It offers built-in vulnerability management and remediation capabilities, P2P patch distribution, a private software repository, update rings, real-time visibility, robust security features like MFA and RBAC, and more than 100 customizable report templates.
Give Action1 a try and solve your OS patching challenges for good. Visit our website, create your account, deploy the agent, and start remediating vulnerabilities in less than 5 minutes with a patching solution that just works!
About Action1
Action1 is an autonomous endpoint management platform that is cloud-native, infinitely scalable, highly secure, and configurable in 5 minutes—it just works and is always free for the first 200 endpoints, with no functional limits. By pioneering autonomous OS and third-party patching—AEM’s foundational use case—through peer-to-peer patch distribution and real-time vulnerability assessment without needing a VPN, it eliminates costly, time-consuming routine labor, preempts ransomware and security risks, and protects the digital employee experience. Trusted by thousands of enterprises managing millions of endpoints globally, Action1 is certified for SOC 2 and ISO 27001.
The company is founder-led by industry veterans Alex Vovk and Mike Walters, American entrepreneurs who founded Netwrix, which has grown into a multi-billion-dollar industry-leading cybersecurity company.
