Tuesday 13 January 2026
January 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Superseded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 January 2026.
The CVEs it fixes are unknown; no open known issues found in the current public evidence; out-of-band fixes followed on 17 Jan, 24 Jan. See November 2026 Patch Tuesday.
MSRC's January 2026 security update document isn't collected.
ChangeIntel's reading of public signals, not advice; check Microsoft's guidance and test before you deploy. Terms
- Microsoft CVEs
- Unknown
- Exploited fixed
- Unknown
- In CISA KEV
- Unknown
- Open known issues
- 0
- Out-of-band
- 12
Release calendar · October 2026
Thu 1 Oct
Fri 2 Oct
Sat 3 Oct
Sun 4 Oct
Mon 5 Oct
Tue 6 Oct
Wed 7 Oct
Thu 8 Oct
Fri 9 Oct
Sat 10 Oct
Sun 11 Oct
Mon 12 Oct
Tue 13 Oct
- Patch Tuesday
- KB5126868 · Win 10 1607, Server 2016
- KB5126651 · Win 10 1809, Server 2019
+36 more
- KB5126657 · Win 10 21H2, Win 10 22H2
- KB5126653 · Win 11 23H2
- KB5127648 · Win 11 24H2, Win 11 25H2
- KB5127646 · Win 11 26H1
- KB5126655 · Server 2022
- KB5126646 · Server 2025
- KB5127666 · .NET Framework
- KB5127683 · .NET Framework
- KB5127684 · .NET Framework
- KB5127685 · .NET Framework
- KB5127687 · .NET Framework
- KB5127689 · .NET Framework
- KB5127690 · .NET Framework
- KB5127691 · .NET Framework
- KB5127692 · .NET Framework
- KB5127693 · .NET Framework
- KB5127694 · .NET Framework
- KB5128923 · .NET Framework
- KB5128924 · .NET Framework
- KB5128925 · .NET Framework
- KB5128928 · .NET Framework
- KB5127660 · .NET Framework
- KB5127664 · .NET Framework
- KB5127667 · .NET Framework
- KB5127668 · .NET Framework
- KB5127686 · .NET Framework
- KB5127688 · .NET Framework
- Microsoft 365 Apps 6 releases
- Exchange Server SE 15.2.2562.56
- Exchange Server 2019 2 releases
- Exchange Server 2016 15.1.2507.77
- SharePoint Server Subscription Edition 16.0.20326.20190
- SQL Server 2025 2 releases
- SQL Server 2022 2 releases
- SQL Server 2019 2 releases
- SQL Server 2017 2 releases
Wed 14 Oct
Thu 15 Oct
Fri 16 Oct
Sat 17 Oct
Sun 18 Oct
Mon 19 Oct
Tue 20 Oct
Wed 21 Oct
Fri 23 Oct
Sat 24 Oct
Sun 25 Oct
Mon 26 Oct
Tue 27 Oct
Thu 29 Oct
Fri 30 Oct
Sat 31 Oct
Patch Tuesday and security (B) releasesPreview (D) releasesOut-of-band releases.NET Framework servicing packagesEdge, Office, Teams, Defender and server releasesAll product versions