# CVE-2026-25571: Denial of service in SICAM SIAPP SDK

> An attacker can cause a denial of service by sending oversized input to the SICAM SIAPP SDK client, triggering a stack overflow.

- **Severity:** Medium 5.9 (`CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 10 Mar 2026
- **Updated:** 10 Mar 2026
- **Also known as:** GHSA-5j43-pp23-m43c

## What is CVE-2026-25571?

CVE-2026-25571 is a medium-severity denial of service vulnerability in Siemens SICAM SIAPP SDK, published on 10 Mar 2026. 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 SIAPP SDK (All versions < V2.1.7). The SICAM SIAPP SDK client component does not enforce maximum length checks on certain variables before use. This could allow an attacker to send an oversized input that could trigger a stack overflow crashing the process and potentially causing denial of service.

Weakness: CWE-130 (Improper Handling of Length Parameter Inconsistency)

## Which versions are affected by CVE-2026-25571?

It affects 1 product.


Products: Siemens Sicam Siapp Sdk.

## How do I fix CVE-2026-25571?

No fix has been published for CVE-2026-25571 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-25571 being exploited?

There is no known exploitation of CVE-2026-25571 in the wild and no public exploit code.

## Other vulnerabilities in Siemens SICAM SIAPP SDK

- [CVE-2026-25573](https://insights.sbomify.com/CVE-2026-25573/): Command injection in SICAM SIAPP SDK (high 8.6)
- [CVE-2026-25569](https://insights.sbomify.com/CVE-2026-25569/): Memory corruption in SICAM SIAPP SDK (high 7.5)
- [CVE-2026-25570](https://insights.sbomify.com/CVE-2026-25570/): Memory corruption in SICAM SIAPP SDK (high 7.5)
- [CVE-2026-25572](https://insights.sbomify.com/CVE-2026-25572/): Denial of service in SICAM SIAPP SDK (medium 5.9)
- [CVE-2026-25605](https://insights.sbomify.com/CVE-2026-25605/): Path traversal in SICAM SIAPP SDK (medium 5.9)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-25571 and fix it if it is affected.

What it is: CVE-2026-25571 is a medium-severity denial of service vulnerability in Siemens SICAM SIAPP SDK, published on 10 Mar 2026. 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-2026-25571 in the wild and no public exploit code.

Affected product: Siemens SICAM SIAPP SDK. 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-2026-25571/ (Markdown: https://insights.sbomify.com/CVE-2026-25571/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-25571
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-25571
- OSV: https://osv.dev/vulnerability/CVE-2026-25571

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-25571/
Summaries are generated and may contain mistakes; the official description above is the record.