Security · High impactFan score 65 · Tier A5 sources

Microsoft Patch Tuesday November 2027 , (Tue, Nov 10th)

The Brief · written from 5 sources

Microsoft's November 2026 Patch Tuesday fixed more than 1,000 flaws; source counts vary from 1,093 (The Record) to 1,260 (SANS).
Microsoft says it is aware of active exploitation of Outlook zero-day CVE-2026-124194.
SANS reports 68 of the vulnerabilities are critical and 167 are Chromium issues affecting Microsoft Edge.
Windows 10 extended security update KB5131096 includes the November 2026 fixes plus a few bug fixes and changes.

Why it matters

The exploited Outlook zero-day makes this update a priority for anyone running Outlook. The sheer volume of fixes also means teams need to plan testing and deployment for a large patch batch.

Who’s affected

Organisations running Microsoft Outlook
Windows 10 systems receiving extended security updates
Microsoft Edge users

What to do

Install the November 2026 Patch Tuesday updates, prioritising the Outlook fix for CVE-2026-124194
Windows 10 systems enrolled in extended security updates can install KB5131096

Windows 10 KB5131096
CVE-2026-124194
#patch-tuesday
#microsoft
#outlook
#zero-day
#windows
#vulnerability

Microsoft continues its AI-induced patch surge, addressing 1,260 different vulnerabilities this month. 68 of these vulnerabilities are considered critical. 167 of the vulnerabilities are Chromium issues affecting Microsoft Edge.

Read the full story at isc.sans.edu ↗