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. 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 KB5002840
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
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 7.5 (High). EPSS exploit probability up to 3.6%.
Among the top half of tracked Microsoft updates by EPSS exploit probability.
What to do
Moderate priority: schedule it in your normal patch cycle. Senserva flags whether KB5002840 is missing on your devices.
Check if KB5002840 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-2026-21260 | High | 7.5 | 3.6% | No |
| CVE-2026-21511 | High | 7.5 | 3.6% | No |
Affected products
Also released in February 2026
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.