# CVE-2020-10040: Information disclosure in SICAM MMU

> Local attackers can retrieve clear-text passwords from Siemens SICAM MMU, SGU, and T devices, exposing sensitive credentials.

- **Severity:** Medium 5.5 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 14 Jul 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-j8wq-fvx8-fqfh

## What is CVE-2020-10040?

CVE-2020-10040 is a medium-severity vulnerability in Siemens AG SICAM MMU, published on 14 Jul 2020. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A vulnerability has been identified in SICAM MMU (All versions < V2.05), SICAM SGU (All versions), SICAM T (All versions < V2.18). An attacker with local access to the device might be able to retrieve some passwords in clear text.

Weakness: CWE-916 (Use of Password Hash With Insufficient Computational Effort)

## Which versions are affected by CVE-2020-10040?

It affects 3 products.


Products: Siemens Sicam Mmu Firmware, Siemens Sicam Sgu Firmware, Siemens Sicam T Firmware.

## How do I fix CVE-2020-10040?

No fix has been published for CVE-2020-10040 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-10040 being exploited?

There is no known exploitation of CVE-2020-10040 in the wild and no public exploit code.

## Other vulnerabilities in Siemens AG SICAM MMU

- [CVE-2020-10038](https://insights.sbomify.com/CVE-2020-10038/): Auth bypass in SICAM MMU (critical 9.8)
- [CVE-2020-10042](https://insights.sbomify.com/CVE-2020-10042/): Memory corruption in SICAM MMU (critical 9.8)
- [CVE-2020-10045](https://insights.sbomify.com/CVE-2020-10045/): Auth bypass in SICAM MMU (high 8.8)
- [CVE-2020-10039](https://insights.sbomify.com/CVE-2020-10039/): Other in SICAM MMU (high 8.1)
- [CVE-2020-10037](https://insights.sbomify.com/CVE-2020-10037/): Information disclosure in SICAM MMU (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-10040 and fix it if it is affected.

What it is: CVE-2020-10040 is a medium-severity vulnerability in Siemens AG SICAM MMU, published on 14 Jul 2020. 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-2020-10040 in the wild and no public exploit code.

Affected product: Siemens AG SICAM MMU. 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-2020-10040/ (Markdown: https://insights.sbomify.com/CVE-2020-10040/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-10040
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-10040
- OSV: https://osv.dev/vulnerability/CVE-2020-10040

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From sbomify Insights: https://insights.sbomify.com/CVE-2020-10040/
Summaries are generated and may contain mistakes; the official description above is the record.