Definition
Microsoft’s monthly security update release cycle, typically second Tuesday of each month.
Key Points
- Sept 2026: KB5002914 broke Excel paste (2016-2024); Sept 8 updates broke RDS, partial USB audio
- Emergency OOB fixes Sept 14: KB5129194/9195/9236 for RDS; Excel fix still pending
- Patch Tuesday Sept 2026 addressed 966 flaws including 2 zero-days