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Superseded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 · May 2026
Fri 1 May
Sat 2 May
Sun 3 May
Mon 4 May
Tue 5 May
Wed 6 May
Thu 7 May
Fri 8 May
Sat 9 May
Sun 10 May
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Wed 13 May
Thu 14 May
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Tue 19 May
Wed 20 May
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Mon 25 May
Wed 27 May
Thu 28 May
Fri 29 May
Sat 30 May
Sun 31 May
Patch Tuesday and security (B) releasesPreview (D) releasesOut-of-band releases.NET Framework servicing packagesEdge, Office, Teams, Defender and server releasesAll product versions