Patch tracker / KB catalog
Microsoft KB catalog
The full Microsoft KB list, newest first: 1141 updates, 319 of them fixing a flaw already under attack and 248 rated Critical by Microsoft. The newest month, September 2026, has 67. Each entry carries the download link, the CVEs it fixes, Microsoft's known issues, Intune deploy steps, and a PowerShell check for whether it is installed. Type below to filter the whole catalog of Microsoft KB numbers by KB, product, update type, Severity, known issues or OS build, or jump straight to a page with the box beside the title. The whole list exports as CSV or JSON.
Hot right now (Senserva Ranking, 2026-09-22)
| # | KB | Product | Severity | CVEs | Released |
|---|---|---|---|---|---|
| 1 | KB5046615 EXPLOITED | Windows Server 2019 | Critical | 31 | 2024-11-12 |
| 2 | KB5046617 EXPLOITED | Windows Server 2019 | Critical | 33 | 2024-11-12 |
| 3 | KB5046612 EXPLOITED | Windows Server 2019 | Critical | 27 | 2024-11-12 |
| 4 | KB5046616 EXPLOITED | Windows Server 2022 | Critical | 37 | 2024-11-12 |
| 5 | KB5046698 EXPLOITED | Windows Server 2022 | Critical | 37 | 2024-11-12 |
| 6 | KB5046696 EXPLOITED | Windows Server 2019 | Critical | 36 | 2024-11-12 |
| 7 | KB5046618 EXPLOITED | Windows Server 2019 | Critical | 35 | 2024-11-12 |
| 8 | KB5002760 EXPLOITED | Microsoft SharePoint Server 2019 | Critical | 2 | 2025-07-08 |
| 9 | KB5046633 EXPLOITED | Windows Server 2022 | High | 34 | 2024-11-12 |
| 10 | KB5046613 EXPLOITED | Windows Server 2022 | High | 31 | 2024-11-12 |
About this KB catalog
What is the Microsoft KB catalog?
A KB number identifies one Microsoft update. This catalog is the list of every KB Senserva tracks, 1141 of them, with what each one fixes and whether it matters. Every one is in the table on this page, filterable by number, product, update type, Severity, known issues or OS build, and exportable as CSV or JSON.
Is this the Microsoft Update Catalog?
No. Microsoft's Update Catalog at catalog.update.microsoft.com is where you download the update files, and every KB page here links straight to it. This list adds what that catalog does not: the CVEs each KB fixes, exploitation status from CISA KEV and FIRST EPSS, Microsoft's known issues, and a check for whether the update is installed.
How do I find a KB by number?
Type the number in the filter above, or use the jump box beside the title: both go straight to that KB's page. A bare number works, so 5099540 finds KB5099540.
Can I get the KB list as data?
Yes. Each month is a JSON chunk under /api/kb-catalog/, and the wider free feeds and JSON API carry the same patch and CVE data.