Weekly briefing
Week 41 · 11 Oct – 17 Oct 2021 UTC · assess the changes, then plan the next dates.
Coming up1
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Patch Tuesday, 9 November 2021
The second Tuesday of the month, when Microsoft releases security updates for Windows, Office, and servers.
Changed1
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October 2021 Security Updates
Microsoft Security Update Guide
How this list is chosen
Changes from 11 Oct 2021 – 17 Oct 2021 UTC and dates due up to 16 Nov 2021. Dates are the source's own, or labelled as the day ChangeIntel observed a change; never inferred effective dates.
Ranked by kind: exploited vulnerabilities, then up to 3 dates, open known issues, and other notable changes, with at most one entry per feed. Service incidents are on the status board; security baseline downloads, first captures of a document, and metadata-only documentation checks are left out. This is a view of retained evidence, not a reconstruction of everything known at the time.
The briefing is selective. Browse every dated change, review upcoming dates or check the period's coverage.