Patch tracker / KB5002840
KB5002840: Microsoft SharePoint Server 2019 Security Update (February 2026)
KB5002840 is a High security update for Microsoft SharePoint Server 2019, released 2026-02-10. It closes 2 CVEs with a maximum CVSS of 7.5. It is the 17th largest of the 31 updates Microsoft shipped that month, by CVEs closed.
Update summary
Fixes 2 CVEs. Most severe CVSS 7.5 (High). EPSS exploit probability up to 3.6%. 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.
KB5002840 patches two CVEs across SharePoint Enterprise Server 2016, SharePoint Server 2019, and Office 2019 32-bit editions, with the most serious rated High at CVSS 7.5. Neither CVE-2026-21260 nor CVE-2026-21511 is in the CISA KEV catalog and exploit probability is low at 4% EPSS, so this is a scheduled hardening rather than an emergency. On-premises SharePoint farms are the notable exposure here since these servers are often internet-facing and central to document collaboration.
Do this: Schedule this update into your next SharePoint farm patching window, applying it to all 2016 and 2019 servers and the Office 2019 clients in scope.
AI-generated from public data, 2026-07-21. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for KB5002840
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for KB5002840
- Released
- 2026-02-10
- 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 KB5002840 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-2026-21260 | High | 7.5 | 3.6% | No |
| CVE-2026-21511 | High | 7.5 | 3.6% | No |
Scope and sources
- Affected products
- Also released in February 2026
KB5075897
29 CVEs · High · exploitedKB5075899
29 CVEs · High · exploitedKB5075904
24 CVEs · High · exploitedKB5075906
27 CVEs · High · exploitedKB5075912
24 CVEs · High · exploitedKB5075941
26 CVEs · High · exploitedKB5075942
29 CVEs · High · exploitedKB5075943
27 CVEs · High · 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.