What is CVE-2026-40371?

CVE-2026-40371 is a high-severity vulnerability, classified under Improper Handling of Insufficient Permissions or Privileges. CVSS score: 8.8/10. Published 2026-06-09.

How severe is CVE-2026-40371?

High severity. CVSS v3 base score is 8.8 out of 10.

CVE-2026-40371

CVE-2026-40371

Improper handling of insufficient permissions or privileges in Microsoft Dynamics 365 (on-premises) allows an authorized attacker to elevate privileges over a network.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Weakness classification (CWE)

CWE-280 — Improper Handling of Insufficient Permissions or Privileges

References

secure@microsoft.com

Frequently asked questions

What is CVE-2026-40371?: CVE-2026-40371 is a high-severity vulnerability, classified under Improper Handling of Insufficient Permissions or Privileges. CVSS score: 8.8/10. Published 2026-06-09.
How severe is CVE-2026-40371?: High severity. CVSS v3 base score is 8.8 out of 10.