Patch tracker / KB5002671
KB5002671: Microsoft SharePoint Server 2019 Security Update (January 2025)
KB5002671 is a High security update for Microsoft SharePoint Server 2019, released 2025-01-14. It closes 3 CVEs with a maximum CVSS of 7.8. It is the 17th largest of the 44 updates Microsoft shipped that month, by CVEs closed.
Update summary
Fixes 3 CVEs. Most severe CVSS 7.8 (High). EPSS exploit probability up to 1.8%. 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.
Three CVEs, CVE-2025-21344, CVE-2025-21348, and CVE-2025-21393, are resolved here for SharePoint Enterprise Server 2016, Server 2019, and Subscription Edition, all reaching Severity High at CVSS 7.8. This is one of several near-identical KBs for the January cycle covering different SharePoint language editions. Match the package to the language edition installed on each farm server.
Do this: Confirm the SharePoint language edition, then deploy the matching January package.
AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for KB5002671
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for KB5002671
- Released
- 2025-01-14
- Last changed
- 2026-07-29
- Changes tracked
- 3
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 KB5002671 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-2025-21344 | High | 7.8 | 1.8% | No |
| CVE-2025-21348 | High | 7.2 | 1.8% | No |
| CVE-2025-21393 | Medium | 6.3 | 1.8% | No |
Scope and sources
- Affected products
- Also released in January 2025
KB5049981
121 CVEs · Critical · exploitedKB5049984
128 CVEs · Critical · exploitedKB5050009
128 CVEs · Critical · exploitedKB5050021
121 CVEs · Critical · exploitedKB5049983
122 CVEs · CriticalKB5049993
112 CVEs · CriticalKB5050004
93 CVEs · CriticalKB5050006
71 CVEs · CriticalThe full month, summarized: Microsoft Patch Tuesday.
- Authoritative references
See this and every Microsoft update ranked by real-world risk on the Microsoft Patch Tracker.