# CVE-2025-47166: Microsoft SharePoint Server Remote Code Execution Vulnerability

> An authorized attacker can execute arbitrary code remotely via unsafe deserialization in Microsoft SharePoint Server.

- **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:** 10 Jun 2025
- **Updated:** 26 Feb 2026
- **Also known as:** GHSA-jvcx-4h9f-wx33

## What is CVE-2025-47166?

CVE-2025-47166 is a high-severity unsafe deserialization vulnerability in Microsoft Sharepoint Enterprise Server, published on 10 Jun 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.

Weakness: CWE-502 (Deserialization of Untrusted Data)

## Which versions are affected by CVE-2025-47166?

It affects 2 products.


Products: Microsoft Sharepoint Enterprise Server, Microsoft Sharepoint Server.

## How do I fix CVE-2025-47166?

No fix has been published for CVE-2025-47166 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-47166 being exploited?

There is no known exploitation of CVE-2025-47166 in the wild and no public exploit code.

Public exploit code:

- Microsoft SharePoint 2019 - NTLM Authentication (exploitdb)

## Other vulnerabilities in Microsoft Sharepoint Enterprise Server

- [CVE-2019-0604](https://insights.sbomify.com/CVE-2019-0604/): Microsoft SharePoint Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2023-24955](https://insights.sbomify.com/CVE-2023-24955/): Microsoft SharePoint Server Code Injection (high 7.2, exploited in the wild)
- [CVE-2025-49706](https://insights.sbomify.com/CVE-2025-49706/): Microsoft SharePoint Improper Authentication (medium 6.5, exploited in the wild)
- [CVE-2020-1210](https://insights.sbomify.com/CVE-2020-1210/): Microsoft SharePoint Remote Code Execution Vulnerability (critical 9.9)
- [CVE-2020-1595](https://insights.sbomify.com/CVE-2020-1595/): Microsoft SharePoint Remote Code Execution Vulnerability (critical 9.9)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-47166 and fix it if it is affected.

What it is: CVE-2025-47166 is a high-severity unsafe deserialization vulnerability in Microsoft Sharepoint Enterprise Server, published on 10 Jun 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-47166 in the wild and no public exploit code.

Affected product: Microsoft Sharepoint Enterprise Server. 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-2025-47166/ (Markdown: https://insights.sbomify.com/CVE-2025-47166/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-47166
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-47166
- OSV: https://osv.dev/vulnerability/CVE-2025-47166

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From sbomify Insights: https://insights.sbomify.com/CVE-2025-47166/
Summaries are generated and may contain mistakes; the official description above is the record.