# CVE-2025-40935: Denial of service in RUGGEDCOM RMC8388 V5.X

> An authenticated remote attacker can crash Siemens RUGGEDCOM devices by uploading a malformed TLS certificate, causing a temporary denial of service.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/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:** 9 Dec 2025
- **Updated:** 9 Dec 2025
- **Also known as:** GHSA-pjxc-pgw9-pcx2

## What is CVE-2025-40935?

CVE-2025-40935 is a medium-severity denial of service vulnerability in Siemens RUGGEDCOM RMC8388 V5.X, published on 9 Dec 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability has been identified in RUGGEDCOM RMC8388 V5.X (All versions < V5.10.1), RUGGEDCOM RS416Pv2 V5.X (All versions < V5.10.1), RUGGEDCOM RS416v2 V5.X (All versions < V5.10.1), RUGGEDCOM RS900 (32M) V5.X (All versions < V5.10.1), RUGGEDCOM RS900G (32M) V5.X (All versions < V5.10.1), RUGGEDCOM RSG2100 (32M) V5.X (All versions < V5.10.1), RUGGEDCOM RSG2100P (32M) V5.X (All versions < V5.10.1), RUGGEDCOM RSG2288 V5.X (All versions < V5.10.1), RUGGEDCOM RSG2300 V5.X (All versions < V5.10.1), RUGGEDCOM RSG2300P V5.X (All versions < V5.10.1), RUGGEDCOM RSG2488 V5.X (All versions < V5.10.1), RUGGEDCOM RSG907R (All versions < V5.10.1), RUGGEDCOM RSG908C (All versions < V5.10.1), RUGGEDCOM RSG909R (All versions < V5.10.1), RUGGEDCOM RSG910C (All versions < V5.10.1), RUGGEDCOM RSG920P V5.X (All versions < V5.10.1), RUGGEDCOM RSL910 (All versions < V5.10.1), RUGGEDCOM RST2228 (All versions < V5.10.1), RUGGEDCOM RST2228P (All versions < V5.10.1), RUGGEDCOM RST916C (All versions < V5.10.1), RUGGEDCOM RST916P (All versions < V5.10.1). Affected devices do not properly validate input during the TLS certificate upload process of the web service. This could allow an authenticated remote attacker to trigger a device crash and reboot, leading to a temporary Denial of Service on the device.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2025-40935?


## How do I fix CVE-2025-40935?

No fix has been published for CVE-2025-40935 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-40935 being exploited?

There is no known exploitation of CVE-2025-40935 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-40935 and fix it if it is affected.

What it is: CVE-2025-40935 is a medium-severity denial of service vulnerability in Siemens RUGGEDCOM RMC8388 V5.X, published on 9 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-2025-40935 in the wild and no public exploit code.

Affected product: Siemens RUGGEDCOM RMC8388 V5.X. 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-2025-40935/ (Markdown: https://insights.sbomify.com/CVE-2025-40935/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-40935
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-40935
- OSV: https://osv.dev/vulnerability/CVE-2025-40935

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From sbomify Insights: https://insights.sbomify.com/CVE-2025-40935/
Summaries are generated and may contain mistakes; the official description above is the record.