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Superseded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
Known issues from this month's updates
AllNo known issues
Microsoft lists no known issues caused by this month's updates in the collected data.
Out-of-band releases
12 retained updates in this view- KB5077795Win 10 1809, Server 2019
- KB5077796Win 10 21H2, Win 10 22H2
- KB5077797Win 11 23H2
- KB5077744Win 11 24H2, Win 11 25H2
- KB5077800Server 2022
- KB5077793Server 2025
- KB5078131Win 10 1809, Server 2019
- KB5078129Win 10 21H2, Win 10 22H2
- KB5078132Win 11 23H2
- KB5078127Win 11 24H2, Win 11 25H2
- KB5078136Server 2022
- KB5078135Server 2025