Tuesday 9 June 2026
June 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Superseded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 June 2026.
The CVEs it fixes are unknown; no open known issues found in the current public evidence. See November 2026 Patch Tuesday.
MSRC's June 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
- 0
Release calendar · August 2026
Sat 1 Aug
Sun 2 Aug
Mon 3 Aug
Tue 4 Aug
Wed 5 Aug
Thu 6 Aug
Fri 7 Aug
Sat 8 Aug
Sun 9 Aug
Mon 10 Aug
Tue 11 Aug
- Patch Tuesday
- KB5120418 · Win 10 1607, Server 2016
- KB5120238 · Win 10 1809, Server 2019
+13 more
- KB5120249 · Win 10 21H2, Win 10 22H2
- KB5120240 · Win 11 23H2
- KB5121003 · Win 11 24H2, Win 11 25H2
- KB5121000 · Win 11 26H1
- KB5120242 · Server 2022
- KB5120233 · Server 2025
- Microsoft 365 Apps 2 releases
- Exchange Server SE 15.2.2562.46
- Exchange Server 2019 2 releases
- Exchange Server 2016 15.1.2507.72
- SharePoint Server Subscription Edition 16.0.19725.20522
- SharePoint Server 2019 16.0.10417.20198
- SharePoint Server 2016 16.0.5565.1001
Wed 12 Aug
Thu 13 Aug
Fri 14 Aug
Sat 15 Aug
Sun 16 Aug
Mon 17 Aug
Tue 18 Aug
Wed 19 Aug
Thu 20 Aug
Fri 21 Aug
Sat 22 Aug
Sun 23 Aug
Mon 24 Aug
Tue 25 Aug
Wed 26 Aug
Thu 27 Aug
Fri 28 Aug
Sat 29 Aug
Sun 30 Aug
Mon 31 Aug
Patch Tuesday and security (B) releasesPreview (D) releasesOut-of-band releases.NET Framework servicing packagesEdge, Office, Teams, Defender and server releasesAll product versions