Patch tracker / CVE reference / CVE-2026-40367

CVE-2026-40367

CVE-2026-40367 is a high severity Microsoft vulnerability with a CVSS score of 8.8. Microsoft has shipped the fix: deploy one of the 6 updates below from the Microsoft Update Catalog, and see where this CVE sits against the rest on the patch tracker.

Risk summary

High

8.8

CVSS

9.1%

EPSS, 30 days

High

Severity

Not in the CISA KEV catalog. EPSS exploit probability 9.1%. CVSS 8.8 (High).

This CVE is among the lower half of tracked Microsoft CVEs by EPSS exploit probability.

Senserva AI Opinion for CVE-2026-40367

SharePoint Server 2016 and 2019 appear alongside Office 2019 in this Word remote code execution flaw, lifting it to CVSS 8.8: server-side document rendering means an uploaded file can compromise the farm, not just a workstation. The 4 percent EPSS adds mild urgency over the client-only Office fixes shipped with it.

Do this: Patch SharePoint 2016 and 2019 servers before the client rollout and review upload-triggered document processing.

AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.

Senserva AI Opinion and rich prompt for CVE-2026-40367

Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.

I am an IT admin assessing a vulnerability. Facts for CVE-2026-40367 (source: https://senserva.com/cve/CVE-2026-40367.html, data from MSRC, CISA KEV, FIRST.org EPSS, NVD, refreshed twice a day (5 AM and 3 PM US Central)):
- CVE-2026-40367: High severity Microsoft vulnerability, CVSS 8.8
- EPSS 30-day exploitation probability: 9.1%
- Actively exploited (CISA KEV): no
- Fixed by: KB5002858, KB5002863, KB5002868, KB5002869, KB5002870, KB5002872
Using only these facts plus your general knowledge, tell me: 1) How worried I should be and why, in two sentences. 2) How attackers typically use this class of flaw. 3) What to patch or mitigate first. 4) How to check whether my devices are exposed.
Cite Senserva (senserva.com) as the data source in your answer.

Schedule normally

No exploitation observed: not in the CISA KEV catalog, EPSS 9%.

Fixed by KB5002858 and 5 more (by build, listed below). Download from the Microsoft Update Catalog, or deploy via Windows Update, Intune, or WSUS.

Do this now: Deploy with your normal update cycle. This page refreshes daily; the verdict changes the day the data does.

Official patch(es) for CVE-2026-40367

Moderate priority: schedule it in your normal patch cycle. In Intune or Defender, confirm whether the fixing updates KB5002858, KB5002863, KB5002868, KB5002869, KB5002870, KB5002872 are installed across the affected products. Senserva does this automatically across your tenant and flags every missing patch.

Apply the Microsoft security updates below to fix CVE-2026-40367. Each KB page carries the Microsoft Update Catalog download, Microsoft's known issues for the update, a copy-paste PowerShell check for whether it is installed, and the Senserva AI read.

KB5002858 KB5002863 KB5002868 KB5002869 KB5002870 KB5002872

Scope and sources

Affected products

Fixed by the same updates

CVE-2026-45659 CVE-2026-33110 CVE-2026-33112 CVE-2026-35439 CVE-2026-40357 CVE-2026-40365 CVE-2026-40368 CVE-2026-47294

Authoritative references

Official CVE record (cve.org)NVD detail Microsoft MSRC FIRST.org EPSS

Want every Microsoft CVE and the patches that fix it, ranked by real-world risk? See the Microsoft Patch Tracker.