# CVE-2025-48802: Windows SMB Server Spoofing Vulnerability

> An authorized attacker can spoof network communications due to improper certificate validation in Windows SMB Server.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/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 Jul 2025
- **Updated:** 13 Feb 2026
- **Also known as:** GHSA-32c4-pxr5-p8gv

## What is CVE-2025-48802?

CVE-2025-48802 is a medium-severity vulnerability in Microsoft Windows 11 22h2, published on 8 Jul 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Improper certificate validation in Windows SMB allows an authorized attacker to perform spoofing over a network.

Weakness: CWE-295 (Improper Certificate Validation)

## Which versions are affected by CVE-2025-48802?

It affects 4 products.


Products: Microsoft Windows 11 22h2, Microsoft Windows 11 23h2, Microsoft Windows Server 2022, Microsoft Windows Server 2022 23h2.

## How do I fix CVE-2025-48802?

No fix has been published for CVE-2025-48802 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-48802 being exploited?

There is no known exploitation of CVE-2025-48802 in the wild and no public exploit code.

## Other vulnerabilities in Microsoft Windows 11 22h2

- [CVE-2024-49117](https://insights.sbomify.com/CVE-2024-49117/): Windows Hyper-V Remote Code Execution Vulnerability (high 8.8)
- [CVE-2024-21435](https://insights.sbomify.com/CVE-2024-21435/): Windows OLE Remote Code Execution Vulnerability (high 8.8)
- [CVE-2025-24084](https://insights.sbomify.com/CVE-2025-24084/): Windows Subsystem for Linux (WSL2) Kernel Remote Code Execution Vulnerability (high 8.4)
- [CVE-2025-33054](https://insights.sbomify.com/CVE-2025-33054/): Remote Desktop Spoofing Vulnerability (high 8.1)
- [CVE-2025-29828](https://insights.sbomify.com/CVE-2025-29828/): Windows Schannel Remote Code Execution Vulnerability (high 8.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-48802 and fix it if it is affected.

What it is: CVE-2025-48802 is a medium-severity vulnerability in Microsoft Windows 11 22h2, published on 8 Jul 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-2025-48802 in the wild and no public exploit code.

Affected product: Microsoft Windows 11 22h2. 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-2025-48802/ (Markdown: https://insights.sbomify.com/CVE-2025-48802/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-48802
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-48802
- OSV: https://osv.dev/vulnerability/CVE-2025-48802

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-48802/
Summaries are generated and may contain mistakes; the official description above is the record.