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October 2026 Patch Tuesday Forecast: Office Update Issues and Security Fixes

· Original article ↗

Summary

The article reviews September’s record 973 Microsoft CVE fixes, Office update problems, Apple’s macOS zero-day patch, Windows updates and support changes, and forecasts upcoming vendor releases.

Key points

  • Microsoft addressed 973 CVEs in September 2026; two were reported as known exploited, and none were publicly disclosed.
  • Microsoft paused KB5002907 after reports that it removed or deactivated Office 2016 and Office 2019 installations.
  • Apple released macOS 27 Golden Gate and provided an update for zero-day CVE-2026-86950.
  • Windows 11 26H2 was released; the article says Windows 11 24H2 and 25H2 can upgrade to it using an Enablement Package.
  • Out-of-band Windows updates addressed remote desktop, Hyper-V shared-folder, and USB audio issues; some updates also fixed CVEs.
  • The article notes upcoming support milestones for Windows 11 24H2 Home and Pro, Windows Server 2012/2012 R2 ESU, and Exchange Server 2016/2019 ESU.
  • The author expects continued vendor security updates in October and recommends reviewing and consolidating older Office installations.

Article Details

Event Type
September 2026 security updates and software lifecycle announcements, including a Microsoft record number of CVEs addressed, an Office update pause, Apple zero-day remediation, and Windows releases and support changes.
Impact
Microsoft addressed 973 CVEs; two were reported as known exploited, with none publicly disclosed. KB5002907 was paused after reports that it removed or deactivated Office 2016 and Office 2019. Apple patched the zero-day CVE-2026-86950. Updates also addressed other Windows issues, while upcoming support cutoffs may require customers to plan migrations.

CVE

CVE-2026-62721The Windows 11 update counts as a security update because it covers CVE-2026-62721 and the Windows 11 26H1 also fixes CVE-2026-85921.CVE-2026-81963#CVE-2026-85880 #CVE-2026-81963 #KB5002907 #CVE-2026-86950 #Windows11 26H2CVE-2026-85880#CVE-2026-85880 #CVE-2026-81963 #KB5002907 #CVE-2026-86950 #Windows11 26H2CVE-2026-85921The Windows 11 update counts as a security update because it covers CVE-2026-62721 and the Windows 11 26H1 also fixes CVE-2026-85921.CVE-2026-86950#CVE-2026-85880 #CVE-2026-81963 #KB5002907 #CVE-2026-86950 #Windows11 26H2

Vendors

AppleThe update roundup also highlighted Office end-of-support migration issues, Apple’s macOS 27 Golden Gate release with a zero-day fix, and Windows 11 26H2 arriving alongside other important Microsoft fixes and upcomingMicrosoftSeptember 2026 Patch Tuesday set a Microsoft record with 973 CVEs addressed, while only two vulnerabilities were known exploited and none were publicly disclosed.

Products

Exchange Server 2016Next week’s Patch Tuesday will include the final updates for Windows 11 Version 24H2 Home and Professional editions, ESU support for Server 2012 and 2012 R2, and the end of ESU support for Exchange Server 2016/2019.Exchange Server 2019macOS 27 Golden GateThe update roundup also highlighted Office end-of-support migration issues, Apple’s macOS 27 Golden Gate release with a zero-day fix, and Windows 11 26H2 arriving alongside other important Microsoft fixes and upcomingMicrosoft 365Case in point, Microsoft released KB5002907 designed to update out-of-date Microsoft 365 applications.Office 2016KB5002907 caused Office 2016 and Office 2019 removal and deactivation issues, forcing Microsoft to pause the update.Office 2019KB5002907 caused Office 2016 and Office 2019 removal and deactivation issues, forcing Microsoft to pause the update.Office 2024Microsoft 365 or Office 2024, as well as to introduce new channels or just to rename channels based on ever-changing support strategies.Server 2012Next week’s Patch Tuesday will include the final updates for Windows 11 Version 24H2 Home and Professional editions, ESU support for Server 2012 and 2012 R2, and the end of ESU support for Exchange Server 2016/2019.Server 2012 R2Windows 10Microsoft did release several out of band patches for Windows 10, Windows 11 and Server 2025 on September 14th last month.Windows 11 24H2This new operating system shares the same kernel with Windows 11 24H2 and Windows 11 25H2, so those versions can be updated with an Enablement Package direct to Windows 11 26H2 with minimal interruption.Windows 11 25H2This new operating system shares the same kernel with Windows 11 24H2 and Windows 11 25H2, so those versions can be updated with an Enablement Package direct to Windows 11 26H2 with minimal interruption.Windows 11 26H2end-of-support migration issues, Apple’s macOS 27 Golden Gate release with a zero-day fix, and Windows 11 26H2 arriving alongside other important Microsoft fixes and upcoming support cutoffs.Windows Server 2025

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