CVE-2026-40371 Microsoft Dynamics 365 (on-premises) Elevation of Privilege Vulnerability

High 8.8 Published 9 Jun 2026 Updated 24 Sep 2026

An authorized attacker can elevate privileges in Microsoft Dynamics 365 on-premises due to improper permission handling.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-40371?

CVE-2026-40371 is a high-severity vulnerability in Microsoft Dynamics 365, published on 9 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

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

Weakness: CWE-755, CWE-280

Which versions are affected by CVE-2026-40371?

It affects 1 product.

Products include Microsoft Dynamics 365.

How do I fix CVE-2026-40371?

No fix has been published for CVE-2026-40371 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-40371 being exploited?

There is no known exploitation of CVE-2026-40371 in the wild and no public exploit code.

All Microsoft Dynamics 365 vulnerabilities

Sources

Also known as GHSA-q5cq-75qj-crvp.