# CVE-2026-35085: Stack buffer overflow in method gdv-serverconfig

> Remote attackers with user privileges can exploit a stack buffer overflow to gain root access on MBS industrial gateways.

- **Severity:** High 8.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/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:** 3 Jun 2026
- **Updated:** 3 Jul 2026
- **Also known as:** GHSA-57rp-874r-xvf4

## What is CVE-2026-35085?

CVE-2026-35085 is a high-severity memory corruption vulnerability in MBS Double-A Profibus, published on 3 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A remote attacker with user privileges can exploit a stack buffer overflow in gdv-serverconfig to gain full system access as root.

Weakness: CWE-121 (Stack-based Buffer Overflow)

## Which versions are affected by CVE-2026-35085?

It affects 1 product.


Products: Mbs-Solutions Universal Gateway Firmware.

## How do I fix CVE-2026-35085?

No fix has been published for CVE-2026-35085 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-35085 being exploited?

There is no known exploitation of CVE-2026-35085 in the wild and no public exploit code.

## Other vulnerabilities in MBS Double-A Profibus

- [CVE-2026-35075](https://insights.sbomify.com/CVE-2026-35075/): Hardcoded default Password for Service Account (critical 9.3)
- [CVE-2026-35082](https://insights.sbomify.com/CVE-2026-35082/): Local file inclusion vulnerability and deletion in ugw-logread method (high 8.7)
- [CVE-2026-35083](https://insights.sbomify.com/CVE-2026-35083/): Stack buffer overflow in method bac-deviceobject (high 8.7)
- [CVE-2026-35084](https://insights.sbomify.com/CVE-2026-35084/): Stack buffer overflow in method dali-devconfig (high 8.7)
- [CVE-2026-35076](https://insights.sbomify.com/CVE-2026-35076/): Arbitrary file delete vulnerability in method bac-scanresult (high 7.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-35085 and fix it if it is affected.

What it is: CVE-2026-35085 is a high-severity memory corruption vulnerability in MBS Double-A Profibus, published on 3 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-35085 in the wild and no public exploit code.

Affected product: MBS Double-A Profibus. 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-2026-35085/ (Markdown: https://insights.sbomify.com/CVE-2026-35085/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-35085
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-35085
- OSV: https://osv.dev/vulnerability/CVE-2026-35085

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-35085/
Summaries are generated and may contain mistakes; the official description above is the record.