Microsoft’s September security update addressed hundreds of vulnerabilities, including two zero-days that were already being exploited. With some updates also causing problems for businesses, this month highlights why keeping your IT secure requires more than simply clicking “Update”.
What Happened With Microsoft’s September Update?
Microsoft’s September 2026 security update was released on 8 September as part of its regular Patch Tuesday programme.
The update addressed 966 vulnerabilities, including two zero-day vulnerabilities that Microsoft says were being actively exploited. Several affected widely used Microsoft products, including Windows, Microsoft Office, Exchange Server and SQL Server.
For businesses that rely on Microsoft technology every day, this is more than just another software update.
It highlights an important question:
Do you know whether your business systems are properly patched, protected and being actively monitored?
For a business with multiple employees and devices, keeping track of security updates can quickly become difficult. An update can fail, be delayed by a user or create an unexpected problem, all without anyone realising.
This is where proactive IT management becomes important.
What Is a Zero-Day Vulnerability?
A zero-day vulnerability is a security flaw that is being exploited before a fix has been widely available.
They are particularly concerning because attackers may already be using the vulnerability while businesses are still working out how to protect themselves.
Microsoft’s September update addressed two actively exploited zero-days:
- CVE-2026-81963, a Windows Update Stack privilege escalation vulnerability
- CVE-2026-85880, a Windows Advanced Local Procedure Call privilege escalation vulnerability
Businesses do not need to understand the technical details behind every vulnerability. What matters is having a process in place to identify important security updates and make sure they are deployed appropriately.
Patching Isn’t as Simple as Clicking “Update”
Keeping systems updated is essential, but September has also demonstrated why patch management needs to be handled carefully.
Following the September updates, Microsoft confirmed problems affecting some Windows environments. These included issues with Remote Desktop Services, Hyper-V Linux virtual machines and certain USB audio devices.
Microsoft subsequently released emergency out-of-band updates to address some of these issues.
This creates a difficult balance for businesses.
Security updates need to be installed promptly, but businesses also need to know what is being installed, which devices are affected and whether an update has caused problems.
For an individual using a home computer, this might be manageable.
For a business with dozens of devices, multiple applications and employees working across different locations, it becomes much harder.
What Happens When Nobody Is Managing Your IT?
One of the biggest problems businesses face isn’t necessarily a lack of technology. It is a lack of visibility.
If employees are responsible for updating their own computers, you may not know:
- Which devices have successfully installed important updates
- Which devices are missing security patches
- Whether an update has repeatedly failed
- Whether employees are postponing updates
- Whether an update has caused compatibility problems
- Whether older devices are still being used
- Whether your security software is working correctly
You might only discover there is a problem when something stops working or, worse, after a security incident.
This is the difference between reactive IT support and proactive managed IT.
Why Proactive IT Management Matters
Traditional IT support often starts when something goes wrong.
An employee has a problem, they contact IT and someone fixes it.
That support is important, but it does not necessarily prevent problems from happening in the first place.
Managed IT takes a different approach.
Instead of waiting for employees to report issues, an MSP can proactively monitor devices, manage updates, identify potential problems and maintain the wider IT environment.
The goal is simple:
Prevent problems where possible, identify them early when they do occur and keep your business technology secure and reliable.
What Should Your Business Be Doing?
A good patch management process should involve more than simply having automatic updates enabled.
Monitor your devices
Your IT provider should have visibility of the devices being managed and be able to identify machines that are missing important updates.
Prioritise important security updates
Not every update carries the same level of risk.
Vulnerabilities that are already being actively exploited should be treated as a priority, particularly where they affect systems used by your business.
Identify failed updates
An update that fails to install can leave a device exposed.
Regular monitoring helps identify these devices so the issue can be investigated rather than being left unnoticed.
Monitor for problems
As Microsoft’s September updates demonstrate, patches can sometimes introduce unexpected issues.
Businesses need a way to identify and respond to those problems without leaving security updates uninstalled indefinitely.
Keep responsibility clear
Perhaps the most important question is:
Who is responsible for making sure all of this happens?
If the answer is “our employees” or “we just rely on Windows Update”, there may be gaps in your IT management.
This Is Where an MSP Can Help
Patch management is just one part of what a Managed Service Provider does.
An MSP can take responsibility for the ongoing management of your IT environment, giving your business greater visibility and reducing the amount of technical work that falls on employees.
This can include:
- Monitoring and managing business devices
- Managing security and software updates
- Identifying potential IT problems
- Maintaining endpoint security
- Managing Microsoft 365
- Monitoring systems and services
- Providing day-to-day IT support
- Helping protect business data
- Advising on longer-term IT improvements
The important difference is that these services work together.
Your IT provider isn’t simply waiting for someone to report a problem. They are actively managing the environment and looking for ways to keep it secure, reliable and fit for purpose.
Why This Matters for Small and Medium-Sized Businesses
Larger organisations may have dedicated teams responsible for security, infrastructure, patch management and IT operations.
For many small and medium-sized businesses, that simply isn’t practical.
You may have one person responsible for IT alongside their normal role, or employees who are expected to manage their own devices.
That can work when a business is small and its technology requirements are limited. But as the business grows, so does the complexity.
More employees means more devices. More devices mean more updates, accounts, applications and potential security issues to manage.
This is one of the reasons businesses choose managed IT support.
Instead of trying to manage everything internally, they have an experienced IT partner responsible for keeping their technology running properly.
Managed IT Isn’t Just About Fixing Problems
The Microsoft September update is a good example of why modern IT support needs to be proactive.
It isn’t enough to fix a computer when it stops working.
Businesses need to know that their devices are being maintained, security updates are being applied, vulnerabilities are being addressed and potential problems are being identified before they cause disruption.
That’s the value of managed IT.
It gives businesses someone who is actively looking after their technology rather than simply responding when something goes wrong.
How Ventrix IT Can Help
At Ventrix IT, we provide Managed IT Services for businesses across Kent and the South East.
We take a proactive approach to managing our clients’ technology, combining responsive IT support with ongoing monitoring, maintenance, cyber security and Microsoft 365 management.
That means we’re not just there when something breaks.
We work alongside our clients to keep their IT secure, reliable and aligned with their business needs, helping identify and address issues before they become bigger problems.
For businesses without dedicated internal IT expertise, this provides access to an experienced IT team without the need to build one themselves.
Is Your IT Being Proactively Managed?
Microsoft’s September security update is a useful reminder that the technology your business relies on needs ongoing attention.
Security vulnerabilities will continue to be discovered. Software will continue to change. Updates will sometimes create new problems.
The question isn’t whether your business needs to keep its systems updated. It’s whether someone is actively responsible for making sure it happens.
If you’re relying on employees to manage updates themselves, only contacting IT when something breaks or simply aren’t sure whether your systems are being properly maintained, it may be time to take a more proactive approach.
Ventrix IT provides managed IT support for businesses across Kent and the South East. Get in touch to discuss how we can help manage and protect your IT.
