Microsoft’s June 2026 Patch Tuesday was unusually large, with security teams counting around 200 to 206 Microsoft vulnerabilities depending on whether additional Microsoft components and advisory categories are included. It was widely treated as one of the largest Patch Tuesday releases since Microsoft began the programme in 2003.
For a busy business, the answer is not to rush every update onto every machine at once. That creates its own risk. The better approach is to patch by exposure. Fix internet-facing, actively exploited and easily exploitable flaws first, then roll out the rest in controlled stages.
The June release included a large number of critical issues, with several publicly disclosed vulnerabilities and at least one vulnerability reported as exploited in the wild by security researchers. One of the most serious was an HTTP.sys remote code execution vulnerability affecting the Windows HTTP protocol stack. Because HTTP.sys can sit behind web-facing Windows services, that type of weakness deserves fast attention where a system is exposed.
Volume alone is a poor guide to urgency. What matters is whether a flaw is reachable from the internet, already being used by attackers, affects a critical system, or can be triggered without a logged-in user.
Why big patch months are becoming normal
The June release fits a wider pattern. The National Cyber Security Centre has warned organisations to prepare for a “vulnerability patch wave”, driven partly by AI-assisted discovery of long-standing software weaknesses. Its updated guidance also stresses that vulnerability management should start with asset visibility, prioritisation and clear ownership of risk.
That means patching can no longer be treated as a monthly admin job. It needs a repeatable process. You need to know what you run, which systems face the internet, who owns them, and how quickly each class of risk should be fixed.
How to prioritise without grinding work to a halt
Start with visibility. You cannot rank what you cannot see. Keep an accurate inventory of devices, servers, operating systems, cloud services, line-of-business applications and exposed services. Regular vulnerability management services help maintain that view, while routine vulnerability scanning can show which updates are missing.
| Priority | What it usually looks like | Sensible target |
|---|---|---|
| Patch now | Actively exploited, internet-facing, unauthenticated or wormable | Within 24 to 72 hours |
| Patch soon | Critical severity, exploitation likely, or affects core infrastructure | Next maintenance window |
| Scheduled | Important but lower exposure, or needs extra testing | Next planned patch cycle |
| Watch | Low exposure, mitigated, or not applicable to your environment | Monitor and review |
| Retire or isolate | Unsupported software or systems that cannot be patched safely | Replace, upgrade or segment |
The top tier should stay small. If everything is urgent, nothing is. A penetration test can help show which weaknesses could actually be chained together by an attacker, rather than treating every theoretical issue the same.
Roll out updates in rings
Deploy patches in rings. Start with a small pilot group, check for broken applications or performance issues, then widen the rollout. Schedule reboots outside core working hours and tell staff in advance. Where servers are involved, agree maintenance windows before the month’s busiest trading periods.
You should also keep a rollback plan. Patches can occasionally break printing, VPN access, specialist software or older line-of-business systems. A tested business continuity plan turns that into a managed incident rather than a full outage.
What to do when you cannot patch immediately
Some systems cannot be updated straight away. That may be because a vendor has not certified the patch, a production system needs downtime, or a legacy device runs critical software. In those cases, compensating controls matter.
Managed SOC services and MDR services can help detect exploitation attempts while systems are waiting for updates. Network segmentation, firewall rules, application control, extra logging and temporary access restrictions can also reduce exposure.
Users matter too. If staff dismiss prompts, postpone restarts or ignore update messages for weeks, the process fails. Short, regular cyber security awareness training helps people understand why updates and restarts are not optional admin noise.
Finally, deal with unsupported systems. Devices past normal support, including end of support, such as older Windows 10 machines, should be upgraded, enrolled in appropriate extended support where available, isolated, or replaced. Leaving them exposed creates risk no patch process can solve.
The next Patch Tuesday is due on 14 July 2026, so a steady rhythm beats a monthly scramble. If you would like help building a patch routine that protects the business without interrupting it, Northern Star’s managed IT support services in London can set it up and run it for you. Call the team on 0800 319 6032.
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