Tuesday 12 May 2026
May 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Superseded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 May 2026.
The CVEs it fixes are unknown; no open known issues found in the current public evidence. See November 2026 Patch Tuesday.
MSRC's May 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 · July 2026
Wed 1 Jul
Thu 2 Jul
Fri 3 Jul
Sat 4 Jul
Sun 5 Jul
Mon 6 Jul
Tue 7 Jul
Wed 8 Jul
Thu 9 Jul
Fri 10 Jul
Sat 11 Jul
Sun 12 Jul
Mon 13 Jul
Tue 14 Jul
- Patch Tuesday
- KB5099535 · Win 10 1607, Server 2016
- KB5099538 · Win 10 1809, Server 2019
+14 more
- KB5099539 · Win 10 21H2, Win 10 22H2
- KB5099414 · Win 11 23H2
- KB5101650 · Win 11 24H2, Win 11 25H2
- KB5101649 · Win 11 26H1
- KB5099540 · Server 2022
- KB5099536 · Server 2025
- Microsoft 365 Apps 17932.20884
- Exchange Server SE 15.2.2562.45
- Exchange Server 2016 15.1.2507.71
- SharePoint Server Subscription Edition 16.0.19725.20434
- SharePoint Server 2019 16.0.10417.20175
- SharePoint Server 2016 16.0.5561.1001
- SQL Server 2019 2 releases
- SQL Server 2017 2 releases
Wed 15 Jul
Thu 16 Jul
Fri 17 Jul
Sat 18 Jul
Sun 19 Jul
Mon 20 Jul
Tue 21 Jul
Wed 22 Jul
Thu 23 Jul
Fri 24 Jul
Sat 25 Jul
Sun 26 Jul
Mon 27 Jul
Wed 29 Jul
Thu 30 Jul
Fri 31 Jul
Patch Tuesday and security (B) releasesPreview (D) releasesOut-of-band releases.NET Framework servicing packagesEdge, Office, Teams, Defender and server releasesAll product versions