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

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

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 8 Sep 2026
- **Updated:** 14 Oct 2026
- **Also known as:** GHSA-xwmw-4qgg-5h34

## 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 (Improper Control of Generation of Code)

## Which versions are affected by CVE-2026-77908?

It affects 1 product.


Products: 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.

## Is CVE-2026-77908 being exploited?

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

## Other vulnerabilities in Microsoft Dynamics 365

- [CVE-2026-47647](https://insights.sbomify.com/CVE-2026-47647/): Dynamics 365 Elevation of Privilege Vulnerability (critical 9.9)
- [CVE-2026-42898](https://insights.sbomify.com/CVE-2026-42898/): Microsoft Dynamics 365 On-Premises Remote Code Execution Vulnerability (critical 9.9)
- [CVE-2026-32210](https://insights.sbomify.com/CVE-2026-32210/): Microsoft Dynamics 365 (online) Spoofing Vulnerability (critical 9.3)
- [CVE-2026-42833](https://insights.sbomify.com/CVE-2026-42833/): Microsoft Dynamics 365 On-Premises Remote Code Execution Vulnerability (critical 9.1)
- [CVE-2024-38182](https://insights.sbomify.com/CVE-2024-38182/): Microsoft Dynamics 365 Elevation of Privilege Vulnerability (critical 9.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-77908 and fix it if it is affected.

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

Affected product: Microsoft Dynamics 365. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-77908/ (Markdown: https://insights.sbomify.com/CVE-2026-77908/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-77908
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-77908
- OSV: https://osv.dev/vulnerability/CVE-2026-77908

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-77908/
Summaries are generated and may contain mistakes; the official description above is the record.