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Tuesday 13 October 2026

October 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.

← Sep 2026Nov 2026 →
Superseded

Newer updates replace October 2026.

Microsoft fixed 1474 CVEs, 94 critical and 1 exploited; no open known issues found in the current public evidence; out-of-band fixes followed on 26 Oct. See November 2026 Patch Tuesday.

59 of these CVEs were added after 13 Oct 2026; the release-day timeline keeps the original publication dates.

ChangeIntel's reading of public signals, not advice; check Microsoft's guidance and test before you deploy. Terms

Microsoft CVEs
1474
Critical
94
Exploited fixed
1
In CISA KEV
1
Open known issues
0
Out-of-band
8

Exploited and disclosed

All 1474 CVEs
CVE-2026-96951ImportantExploitedCISA KEV · due 16 OctSFBNetwork
Windows Shell Security Feature Bypass Vulnerability
KB5126646KB5126651+7

Advisories · October 2026

MSRC guidance without a CVE of its own · 1 advisory
ADV260001
Hardening changes for ReFS volumes on removable mediaStarting with Windows updates released on and after October 13, 2026, Microsoft is making hardening changes to the Resilient File System (ReFS) . This change is not enable by default until 2027. Please see Hardening changes for ReFS volumes on removable media for more information.
Published 13 Oct28 affected products

Most affected components

Microsoft Office Excel 70
Role: DNS Server 52
Windows Kernel 46
Microsoft Office Word 45
Windows Installer 38
ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 11 Nov 15:16 UTC · 274 of 275 readable · 273 fully read · documentation 469/469 current

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