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. It is the 26th largest of the 60 updates Microsoft shipped that month, by CVEs closed.
Update summary
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.
A newer security update for Microsoft SharePoint Enterprise Server 2016 has shipped since this one: KB5002882 (2026-08-11). For cumulative update families the newer package includes these fixes, so installing that one is usually the shorter path. Verify against your own update rings before you skip this package.
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
- Released
- 2025-10-14
- Last changed
- 2025-10-14
- Changes tracked
- 1
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.
Check if KB5002798 is installed
Elevated PowerShell. No output means it is not installed.
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-2025-59222 | High | 7.8 | 2.3% | No |
| CVE-2025-59221 | High | 7.0 | 2.3% | No |
Scope and sources
- Affected products
- Also released in October 2025
KB5070879
1 CVE · Critical · exploitedKB5070881
1 CVE · Critical · exploitedKB5070882
1 CVE · Critical · exploitedKB5070883
1 CVE · Critical · exploitedKB5070884
1 CVE · Critical · exploitedKB5070886
1 CVE · Critical · exploitedKB5070887
1 CVE · Critical · exploitedKB5070892
1 CVE · Critical · exploitedThe full month, summarized: Microsoft Patch Tuesday.
- Authoritative references
See this and every Microsoft update ranked by real-world risk on the Microsoft Patch Tracker.