Patch tracker / KB5002775
KB5002775: Microsoft SharePoint Server 2019 Security Update (September 2025)
KB5002775 is a High security update for Microsoft SharePoint Server 2019, released 2025-09-09. It closes 3 CVEs with a maximum CVSS of 8.8. The most likely of them to be attacked is CVE-2025-54897, which FIRST.org rates at 19% probability of exploitation in the next 30 days.
Update summary
Fixes 3 CVEs. Most severe CVSS 8.8 (High). EPSS exploit probability up to 19%. Among the top 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.
KB5002775 is the September 2025 patch bundle for on-premises SharePoint Enterprise Server 2016, SharePoint Server 2019, and SharePoint Server Subscription Edition, fixing three flaws (CVE-2025-54897, CVE-2025-54905, CVE-2025-54906) with a top rating of High severity at CVSS 8.8. Anyone running these SharePoint farms is exposed, and the 8.8 score points to remote exploitation with meaningful impact, though at 18% EPSS active exploitation is not yet widespread and none of these CVEs are in CISA KEV. Because SharePoint servers often hold sensitive documents and integrate with identity, patching before proof-of-concept code matures is worthwhile.
Do this: Apply KB5002775 to all SharePoint 2016, 2019, and Subscription Edition servers in your farm, following the required server-side update and configuration steps.
AI-generated from public data, 2026-07-21. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for KB5002775
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for KB5002775
- Released
- 2025-09-09
- Last changed
- 2026-08-10
- Changes tracked
- 4
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 KB5002775 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-2025-54897 | High | 8.8 | 19% | No |
| CVE-2025-54906 | High | 7.8 | 19% | No |
| CVE-2025-54905 | High | 7.1 | 19% | No |
Scope and sources
- Affected products
- Also released in September 2025
KB5002778
3 CVEs · HighKB5002784
1 CVE · HighKB5065220
2 CVEs · HighKB5065221
2 CVEs · HighKB5065222
3 CVEs · HighKB5065223
3 CVEs · HighKB5065224
3 CVEs · HighKB5065225
3 CVEs · HighThe full month, summarized: Microsoft Patch Tuesday.
- Authoritative references
See this and every Microsoft update ranked by real-world risk on the Microsoft Patch Tracker.