Patch tracker / KB5002838
KB5002838: Microsoft Office 2019 for 32-bit editi Security Update (March 2026)
KB5002838 is a High security update for Microsoft Office 2019 for 32-bit editi, released 2026-03-10. It closes 1 CVE with a maximum CVSS of 8.4. It is the 32nd largest of the 43 updates Microsoft shipped that month, by CVEs closed.
Update summary
Fixes 1 CVE. Most severe CVSS 8.4 (High). EPSS exploit probability up to <1%. Among the lower half of tracked Microsoft updates by EPSS exploit probability.
A newer security update for Microsoft Office 2019 for 32-bit editions has shipped since this one: KB5002755 (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.
KB5002838 patches a single flaw, CVE-2026-26110, rated High with a CVSS of 8.4 across Office 2019 (32-bit and 64-bit) and Microsoft 365 Apps for Enterprise on 32-bit systems. The high CVSS reflects real impact, but EPSS is 0% and the CVE is not in CISA KEV nor linked to ransomware, so there is no evidence of active exploitation yet. This is a schedule-and-deploy item rather than an emergency, but the 8.4 score means it should not sit indefinitely.
Do this: Add KB5002838 to your next Office patch cycle and confirm it reaches all 32-bit and 64-bit Office 2019 and 32-bit Microsoft 365 Apps for Enterprise installs.
AI-generated from public data, 2026-07-21. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for KB5002838
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for KB5002838
- 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 KB5002838 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-2026-26110 | High | 8.4 | <1% | No |
Scope and sources
- Affected products
- Also released in March 2026
KB5002843
3 CVEs · HighKB5002845
4 CVEs · HighKB5002850
4 CVEs · HighKB5077464
2 CVEs · HighKB5077465
2 CVEs · HighKB5077466
3 CVEs · HighKB5077468
3 CVEs · HighKB5077469
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.