Patch Tuesday · Tuesday 12 May 2026
May 2026: is it safe to deploy?
What Microsoft fixed, how urgent it is, and whether anything broke, per Windows version, from Microsoft's release tables, release health, MSRC, CISA, and what the community reports.
Superseded
Newer updates replace May 2026.
no open known issues from these updates. The cards below show what to deploy for each Windows version and why.
Exploited fixed 0
In CISA KEV 0
Open known issues 0
Out-of-band 0 What to deploy, per Windows versionMark each Windows version deployed or not for you to track this month
Urgency Routine · 1 CVEs
Risk Moderate
Urgency Routine
Risk Moderate
Urgency Routine
Risk Moderate
Urgency Routine
Risk Moderate
Urgency Routine
Risk Moderate
Urgency Routine
Risk Moderate
Urgency Routine
Risk Moderate
Urgency Routine
Risk Moderate
Urgency Routine
Risk Moderate
Urgency Routine
Risk Moderate
Urgency Routine
Risk Moderate
Urgency Routine
Risk Moderate
Nothing exploited or disclosed MSRC lists no exploited or publicly disclosed Microsoft CVEs for this release.
Known issues from this month's updatesWindows release health
No known issues Microsoft lists no known issues caused by this month's updates.
What people are sayingNews and community
Windows news
26 May 2026
Windows news
12 May 2026
MSRC release
12 May 2026
Most affected components
MSRC component data is not collected for this release.
How readiness works. Each verdict comes from public signals only: the CVEs MSRC lists as fixed, CISA's exploited catalog, EPSS, the known issues Microsoft publishes on Windows release health, out-of-band follow-ups, and news or community posts that mention the KB. It is a starting point for your own testing, not a guarantee for your environment.
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