# CVE-2025-44016: File Hash Validation Bypass in NomadBranch.exe

> Attackers can bypass file integrity checks in TeamViewer DEX Client to execute arbitrary code by providing a valid hash for a malicious file.

- **Severity:** High 8.8 (`CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 11 Dec 2025
- **Updated:** 11 Dec 2025
- **Also known as:** GHSA-xqm7-qxfg-5xwm

## What is CVE-2025-44016?

CVE-2025-44016 is a high-severity vulnerability in TeamViewer DEX, published on 11 Dec 2025. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A vulnerability in TeamViewer DEX Client (former 1E client) - Content Distribution Service (NomadBranch.exe) prior version 25.11 for Windows allows malicious actors to bypass file integrity validation via a crafted request. By providing a valid hash for a malicious file, an attacker can cause the service to incorrectly validate and process the file as trusted, enabling arbitrary code execution under the Nomad Branch service context.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2025-44016?

It affects 1 product.


Products: Teamviewer Digital Employee Experience.

## How do I fix CVE-2025-44016?

No fix has been published for CVE-2025-44016 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-44016 being exploited?

There is no known exploitation of CVE-2025-44016 in the wild and no public exploit code.

## Other vulnerabilities in TeamViewer DEX

- [CVE-2025-64986](https://insights.sbomify.com/CVE-2025-64986/): Command Injection in 1E-Explorer-TachyonCore-DevicesListeningOnAPort Instruction (high 7.2)
- [CVE-2025-64987](https://insights.sbomify.com/CVE-2025-64987/): Command Injection in 1E-Explorer-TachyonCore-CheckSimpleIoC Instruction (high 7.2)
- [CVE-2025-64988](https://insights.sbomify.com/CVE-2025-64988/): Command Injection in 1E-Nomad-GetCmContentLocations Instruction (high 7.2)
- [CVE-2025-64989](https://insights.sbomify.com/CVE-2025-64989/): Command Injection in 1E-Explorer-TachyonCore-FindFileBySizeAndHash Instruction (high 7.2)
- [CVE-2026-23571](https://insights.sbomify.com/CVE-2026-23571/): Command Injection in 1E-Nomad-RunPkgStatusRequest Instruction in TeamViewer DEX (medium 6.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-44016 and fix it if it is affected.

What it is: CVE-2025-44016 is a high-severity vulnerability in TeamViewer DEX, published on 11 Dec 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-44016 in the wild and no public exploit code.

Affected product: TeamViewer DEX. 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-2025-44016/ (Markdown: https://insights.sbomify.com/CVE-2025-44016/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-44016
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-44016
- OSV: https://osv.dev/vulnerability/CVE-2025-44016

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-44016/
Summaries are generated and may contain mistakes; the official description above is the record.