CVE-2026-77908 Microsoft Dynamics 365 On-Premises Remote Code Execution Vulnerability

High 8.8 Published 8 Sep 2026 Updated 14 Oct 2026

An authorized attacker can execute arbitrary code remotely in Microsoft Dynamics 365 On-Premises due to improper code generation control.

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-2026-77908?

CVE-2026-77908 is a high-severity code injection vulnerability in Microsoft Dynamics 365, published on 8 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Improper control of generation of code ('code injection') in Microsoft Dynamics 365 allows an authorized attacker to execute code over a network.

Weakness: CWE-94

Which versions are affected by CVE-2026-77908?

It affects 1 product.

Products include Microsoft Dynamics 365.

How do I fix CVE-2026-77908?

No fix has been published for CVE-2026-77908 yet. Limit exposure of the affected software until one is available.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2026-77908 being exploited?

There is no known exploitation of CVE-2026-77908 in the wild and no public exploit code.

All Microsoft Dynamics 365 vulnerabilities

Sources

Also known as GHSA-xwmw-4qgg-5h34.