Patch tracker / KB5002843
KB5002843: Microsoft SharePoint Server 2019 Security Update (March 2026)
KB5002843 is a High security update for Microsoft SharePoint Server 2019, released 2026-03-10. It closes 3 CVEs with a maximum CVSS of 8.8. It is the 18th largest of the 38 updates Microsoft shipped that month, by CVEs closed.
Update summary
Fixes 3 CVEs. Most severe CVSS 8.8 (High). EPSS exploit probability up to 1.4%. 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: KB5002873 (2026-07-14). 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.
KB5002843 patches three CVEs across SharePoint Enterprise Server 2016, Server 2019, and Subscription Edition, with the worst rated High severity at CVSS 8.8. Anyone running on-premises SharePoint farms is exposed, and because the fix spans all three supported on-prem versions the same patch cycle touches most self-hosted deployments. None of the three CVEs are in the CISA KEV catalog or ransomware-linked yet, and EPSS sits at 1 percent, so this is a patch-on-schedule item rather than a drop-everything emergency.
Do this: Schedule KB5002843 across all on-premises SharePoint 2016, 2019, and Subscription Edition farms in your normal March patch window and confirm the version-specific package matches each farm.
AI-generated from public data, 2026-07-21. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for KB5002843
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for KB5002843
- Released
- 2026-03-10
- Last changed
- 2026-03-10
- 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 KB5002843 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-2026-26105 | High | 8.8 | 3.0% | No |
| CVE-2026-26106 | High | 8.8 | 3.0% | No |
| CVE-2026-26113 | High | 8.8 | 3.0% | No |
Scope and sources
- Affected products
- Also released in March 2026
KB5002845
4 CVEs · HighKB5002850
4 CVEs · HighKB5077464
2 CVEs · HighKB5077465
2 CVEs · HighKB5077466
3 CVEs · HighKB5077468
3 CVEs · HighKB5077469
2 CVEs · HighKB5077470
2 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.