Patch tracker / KB5002789
KB5002789: Microsoft SharePoint Server 2019 Security Update (October 2025)
KB5002789 is a High security update for Microsoft SharePoint Server 2019, released 2025-10-14. It closes 2 CVEs with a maximum CVSS of 7.8. Get it from the Microsoft Update Catalog below, and see where it sits against the rest of the month on the patch tracker.
Update summary
New to these terms? How the Microsoft patching tools fit together, this month's Patch Tuesday summary, and every update ranked by real-world risk.
Senserva AI Opinion for KB5002789
KB5002789 patches two vulnerabilities (CVE-2025-59221 and CVE-2025-59222) across SharePoint Server 2016 and 2019 plus Office 2019 32-bit, with a High severity rating at CVSS 7.8. What stands out is the mixed SharePoint-and-Office footprint from a single October 2025 KB, so both server admins and client-side Office 2019 users are in scope. Neither CVE is in CISA KEV or linked to ransomware, and EPSS is currently 0%, so there is no evidence of active exploitation yet.
Do this: Schedule KB5002789 across your SharePoint 2016/2019 farms and Office 2019 32-bit installs this cycle, prioritizing internet-facing SharePoint servers first.
AI-generated from public data, 2026-07-21. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for KB5002789
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for KB5002789
Senserva began recording day-to-day change history on 2026-07-07, and refreshes it several times a day. Release dates are historical where Microsoft publishes them; revision history is tracked from that date forward, so it does not include changes made before then.
Exploitation and severity
Fixes 2 CVEs. Most severe CVSS 7.8 (High). EPSS exploit probability up to <1%.
Among the lower half of tracked Microsoft updates by EPSS exploit probability.
What to do
Moderate priority: schedule it in your normal patch cycle. Senserva flags whether KB5002789 is missing on your devices.
Check if KB5002789 is installed
Copy-paste PowerShell: one machine, or your whole estate in one pass. No output means the update is not installed.
Get-HotFix covers Windows updates. Office, SharePoint, and Exchange server updates show under installed updates in Programs and Features, or check the Update Catalog history.
CVEs fixed by this update
Sorted exploited-first, then by CVSS. Every CVE links to its Senserva page with the full risk facts, references, and a ready-to-paste AI prompt.
| CVE | Severity | CVSS | EPSS | Exploited |
|---|---|---|---|---|
| CVE-2025-59221 | High | 8.8 | 2.3% | No |
| CVE-2025-59222 | High | 8.8 | 2.3% | No |
Affected products
Also released in October 2025
The highest-risk updates from the same release:
The full month, summarized: Microsoft Patch Tuesday.
Authoritative references
See this and every Microsoft update ranked by real-world risk on the Microsoft Patch Tracker.