Patch tracker / KB5002798
KB5002798: Microsoft SharePoint Server 2019 Security Update (October 2025)
KB5002798 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 KB5002798
KB5002798 patches two vulnerabilities (CVE-2025-59221 and CVE-2025-59222) spanning SharePoint Enterprise Server 2016, SharePoint Server 2019, and Office 2019 32-bit, with a highest rating of High and CVSS 7.8. The on-premises SharePoint footprint is what makes this notable: those servers are internet-adjacent collaboration platforms that are harder to patch quickly than a workstation. No CVE here is in CISA KEV and EPSS sits at 0%, so there is no confirmed active exploitation yet, but the cross-product scope means you likely need to touch both server farms and client Office installs.
Do this: Schedule KB5002798 deployment across your SharePoint 2016 and 2019 farms and Office 2019 32-bit clients, starting with the internet-facing SharePoint servers.
AI-generated from public data, 2026-07-21. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for KB5002798
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for KB5002798
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 KB5002798 is missing on your devices.
Check if KB5002798 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.