Microsoft Patch Tuesday is getting harder to manage, and that puts data at risk

Microsoft created Patch Tuesday to simplify updates by making them consistent and easy to plan around. But with cyberthreats continually expanding in volume and severity, it’s becoming more difficult for any vendor to make patching easy.

The volume of vulnerabilities that necessitate patches has exploded. Microsoft’s March 2026 Patch Tuesday addressed more than 80 vulnerabilities across Windows, Office, Azure and other core services, including critical flaws and zero days.

In 2025, Microsoft averaged almost 95 patches per month. By contrast, in 2016, Microsoft released only 143 security bulletins for the entire year. The scale of both patches and systems to patch continues to grow rapidly, which illustrates the need for a dedicated backup solution to protect data from a wide variety of threats.

Given the volume of both threats and patches, it’s no surprise that the fixes themselves can cause unanticipated problems. For instance, in late March 2026, Microsoft released an out-of-band emergency update days after one of its Tuesday patches caused issues that prevented users from logging into key services.

Keeping software safely up and running is a massive task for vendors and customers alike. Many large vendors struggle to keep up. As a result, large releases of patches are less predictable and more difficult to put in place than they used to be That’s a problem for IT pros charged with protecting data. They must make a choice: Patch immediately and risk disruption or delay and risk exposure. Neither option is ideal, and both carry consequences.

Microsoft environments are highly interconnected in a way they weren’t when Microsoft inaugurated Patch Tuesday in 2003. These days, a single update can affect operating systems, productivity apps, identity services and cloud infrastructure all at once.

That complexity makes patching inherently risky. Organizations must apply updates quickly to close security gaps, but they also need to test patches to avoid breaking critical functionality. When those goals conflict, problems arise.

The March 2026 login issue is a good example. A routine update disrupted authentication across multiple services, providing a good example of how tightly coupled systems have become. At the same time, the number and variety of vulnerabilities continue to grow. Each Patch Tuesday includes dozens of fixes spanning different systems and threat types. Emergency patches tied to broader cybersecurity concerns only add to the pressure. The result is an update process that is reactive by nature and therefore less predictable.

In practice, patching is rarely uniform. Some systems update immediately. Others experience delays or just fail altogether. That creates security gaps, but it also introduces another risk: data loss.

When updates are rushed or inconsistent, they can lead to application failures, corrupted files or sync issues across cloud services. In Microsoft 365 environments, even a small issue can ripple across email, files and collaboration tools. Over time, the result is a fragile environment where both security and data integrity are at risk.

Patching is necessary for security, but it does not protect your data. Even in fully updated environments, problems still occur. Updates can introduce bugs. Cyberattacks can happen before patches are applied. Users can accidentally overwrite or delete critical information.

The situation is especially critical when it comes to Microsoft 365. Many users assume their data is automatically protected, but it isn’t. Microsoft follows a shared responsibility model, which means customers are responsible for their own Microsoft 365 data protection. Without a dedicated backup solution, recovery options are limited and often incomplete.

A reliable Microsoft 365 backup solution is critical to a strategy that ensures your data remains protected regardless of what happens during or after Patch Tuesday. It provides a safety net for core services like Exchange Online, OneDrive, SharePoint and Teams.

With proper Microsoft 365 backup in place, you can recover from ransomware, accidental deletion or even issues caused by faulty updates. Instead of relying on patching to prevent every problem, backup ensures you can recover from virtually any problem.

You cannot control the number or type of patches any vendor releases, but you can control whether your data is protected. When patching becomes unpredictable, backup is the only safety net you can rely on.

Find out how Acronis helps businesses secure their Microsoft 365 environments.