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.

← Dec 2025 Feb 2026 →

Superseded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 2027

Fri 1 Oct

Sat 2 Oct

Sun 3 Oct

Mon 4 Oct

Tue 5 Oct

Wed 6 Oct

Thu 7 Oct

Fri 8 Oct

Sat 9 Oct

Sun 10 Oct

Mon 11 Oct

Tue 12 Oct

Patch Tuesday

Wed 13 Oct

Thu 14 Oct

Fri 15 Oct

Sat 16 Oct

Sun 17 Oct

Mon 18 Oct

Tue 19 Oct

Wed 20 Oct

Thu 21 Oct

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Sat 23 Oct

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Mon 25 Oct

Tue 26 Oct

Wed 27 Oct

Thu 28 Oct

Fri 29 Oct

Sat 30 Oct

Sun 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