# CVE-2025-41765: Unchecked role in wwwupload.cgi

> An unauthorized remote attacker can exploit the wwwupload.cgi endpoint to upload and apply arbitrary data, potentially compromising system integrity and security.

- **Severity:** Critical 9.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Mar 2026
- **Updated:** 9 Mar 2026
- **Also known as:** GHSA-jwj6-8fh8-pw76

## What is CVE-2025-41765?

CVE-2025-41765 is a critical missing authorization vulnerability in MBS UBR-01 Mk II, published on 9 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Due to insufficient authorization enforcement, an unauthorized remote attacker can exploit the wwwupload.cgi endpoint to upload and apply arbitrary data. This includes, but is not limited to, contact images, HTTPS certificates, system backups for restoration, server peer configurations, and BACnet/SC server certificates and keys.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2025-41765?

It affects 1 product.


Products: Mbs-Solutions Universal Bacnet Router Firmware.

## How do I fix CVE-2025-41765?

No fix has been published for CVE-2025-41765 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-41765 being exploited?

There is no known exploitation of CVE-2025-41765 in the wild and no public exploit code.

## Other vulnerabilities in MBS UBR-01 Mk II

- [CVE-2025-41764](https://insights.sbomify.com/CVE-2025-41764/): Unchecked role in wwwupdate.cgi (critical 9.1)
- [CVE-2025-41757](https://insights.sbomify.com/CVE-2025-41757/): Arbitrary Write with ubr-restore (high 8.8)
- [CVE-2025-41758](https://insights.sbomify.com/CVE-2025-41758/): Arbitrary Write with wwwupload.cgi (high 8.8)
- [CVE-2025-41766](https://insights.sbomify.com/CVE-2025-41766/): Stack buffer overflow on parsing web request (high 8.8)
- [CVE-2025-41756](https://insights.sbomify.com/CVE-2025-41756/): Arbitrary Write with ubr-editfile (high 8.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-41765 and fix it if it is affected.

What it is: CVE-2025-41765 is a critical missing authorization vulnerability in MBS UBR-01 Mk II, published on 9 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-41765 in the wild and no public exploit code.

Affected product: MBS UBR-01 Mk II. 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-2025-41765/ (Markdown: https://insights.sbomify.com/CVE-2025-41765/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-41765
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-41765
- OSV: https://osv.dev/vulnerability/CVE-2025-41765

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-41765/
Summaries are generated and may contain mistakes; the official description above is the record.