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Superseded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 · April 2027

Thu 1 Apr

Fri 2 Apr

Sat 3 Apr

Sun 4 Apr

Mon 5 Apr

Tue 6 Apr

Wed 7 Apr

Thu 8 Apr

Fri 9 Apr

Sat 10 Apr

Sun 11 Apr

Mon 12 Apr

Tue 13 Apr

Patch Tuesday

Wed 14 Apr

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Fri 16 Apr

Sat 17 Apr

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Mon 26 Apr

Tue 27 Apr

Wed 28 Apr

Thu 29 Apr

Fri 30 Apr

Patch Tuesday and security (B) releasesPreview (D) releasesOut-of-band releases.NET Framework servicing packagesEdge, Office, Teams, Defender and server releasesAll product versions