# CVE-2025-61940: Mirion Medical EC2 Software NMIS BioDose Use of Client-Side Authentication

> Attackers can bypass client-side authentication to access the database directly using a shared SQL Server account, exposing sensitive medical dosimetry data.

- **Severity:** High 8.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N`)
- **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:** 2 Dec 2025
- **Updated:** 9 Dec 2025
- **Also known as:** GHSA-m839-8xgr-vqhm

## What is CVE-2025-61940?

CVE-2025-61940 is a high-severity authentication bypass vulnerability in Mirion Medical EC2 Software NMIS BioDose, published on 2 Dec 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

NMIS/BioDose V22.02 and previous versions rely on a common SQL Server user account to access data in the database. User access in the client application is restricted by a password authentication check in the client software but the underlying database connection always has access. The latest version of NMIS/BioDose introduces an option to use Windows user authentication with the database, which would restrict this database connection.

Weakness: CWE-603 (Use of Client-Side Authentication)

## Which versions are affected by CVE-2025-61940?

It affects 1 product.


Products: Mirion Biodose\/Nmis.

## How do I fix CVE-2025-61940?

No fix has been published for CVE-2025-61940 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-61940 being exploited?

There is no known exploitation of CVE-2025-61940 in the wild and no public exploit code.

## Other vulnerabilities in Mirion Medical EC2 Software NMIS BioDose

- [CVE-2025-62575](https://insights.sbomify.com/CVE-2025-62575/): Mirion Medical EC2 Software NMIS BioDose Incorrect Permission Assignment for Critical Resource (high 8.7)
- [CVE-2025-64298](https://insights.sbomify.com/CVE-2025-64298/): Mirion Medical EC2 Software NMIS BioDose Incorrect Permission Assignment for Critical Resource (high 8.6)
- [CVE-2025-64778](https://insights.sbomify.com/CVE-2025-64778/): Mirion Medical EC2 Software NMIS BioDose Use of Hard-coded Credentials (high 8.4)
- [CVE-2025-64642](https://insights.sbomify.com/CVE-2025-64642/): Mirion Medical EC2 Software NMIS BioDose Incorrect Permission Assignment for Critical Resource (high 7.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-61940 and fix it if it is affected.

What it is: CVE-2025-61940 is a high-severity authentication bypass vulnerability in Mirion Medical EC2 Software NMIS BioDose, published on 2 Dec 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-2025-61940 in the wild and no public exploit code.

Affected product: Mirion Medical EC2 Software NMIS BioDose. 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-2025-61940/ (Markdown: https://insights.sbomify.com/CVE-2025-61940/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-61940
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-61940
- OSV: https://osv.dev/vulnerability/CVE-2025-61940

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-61940/
Summaries are generated and may contain mistakes; the official description above is the record.