Patch tracker / KB5002828
KB5002828: Microsoft SharePoint Server 2019 Security Update (January 2026)
KB5002828 is a Critical security update for Microsoft SharePoint Server 2019, released 2026-01-13. It closes 7 CVEs with a maximum CVSS of 9.8. At least one of them is actively exploited (CISA KEV), so this is a deploy-first update. The most likely of them to be attacked is CVE-2026-20943, which FIRST.org rates at 32% probability of exploitation in the next 30 days.
Update summary
Fixes 7 CVEs. At least one is actively exploited (CISA KEV). Most severe CVSS 9.8 (Critical). EPSS exploit probability up to 32%. Among the top 25% of tracked Microsoft updates by EPSS exploit probability.
A newer security update for Microsoft SharePoint Server 2019 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.
KB5002828 patches 7 CVEs across SharePoint Server 2019 and both 32-bit and 64-bit Office 2016, topping out at Critical (CVSS 9.8), and one of these CVEs is already in the CISA KEV catalog as actively exploited (though not tied to ransomware). SharePoint Server is internet-facing in many environments, so the KEV listing means attackers are hitting this in the wild even though the highest EPSS sits at 23%. The mix of a server product and a widely deployed Office client in one bundle means both your SharePoint farm and every Office 2016 desktop need attention.
Do this: Prioritize patching your SharePoint Server 2019 farm today given the CISA KEV entry, then schedule the Office 2016 client rollout across both architectures.
AI-generated from public data, 2026-07-26. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for KB5002828
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for KB5002828
- Released
- 2026-01-13
- Last changed
- 2026-08-12
- Changes tracked
- 6
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 KB5002828 is installed
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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-2026-20963 | Critical | 9.8 | 32% | KEV |
| CVE-2026-20947 | High | 8.8 | 32% | No |
| CVE-2026-20948 | High | 7.8 | 32% | No |
| CVE-2026-20951 | High | 7.8 | 32% | No |
| CVE-2026-20943 | High | 7.0 | 32% | No |
| CVE-2026-20958 | Medium | 5.4 | 32% | No |
| CVE-2026-20959 | Medium | 4.6 | 32% | No |
Scope and sources
- Affected products
- Also released in January 2026
KB5002822
6 CVEs · Critical · exploitedKB5002825
7 CVEs · Critical · exploitedKB5073379
86 CVEs · Critical · exploitedKB5073450
80 CVEs · Critical · exploitedKB5073455
80 CVEs · Critical · exploitedKB5073457
78 CVEs · Critical · exploitedKB5073722
54 CVEs · Critical · exploitedKB5073723
73 CVEs · Critical · 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.