# CVE-2026-25933: Arduino App Lab has Improper Data Validation in Internal Terminal Interface

> An attacker with physical access to a tampered board can execute arbitrary commands on the host via unsanitized serial metadata in Arduino App Lab.

- **Severity:** Medium 6.9 (`CVSS:3.1/AV:P/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 12 Feb 2026
- **Updated:** 12 Feb 2026
- **Also known as:** GHSA-3652-939f-f7g4

## What is CVE-2026-25933?

CVE-2026-25933 is a medium-severity command injection vulnerability in arduino-app-lab, published on 12 Feb 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

Arduino App Lab is a cross-platform IDE for developing Arduino Apps. Prior to 0.4.0, a vulnerability was identified in the Terminal component of the arduino-app-lab application. The issue stems from insufficient sanitization and validation of input data received from connected hardware devices, specifically in the _info.Serial and _info.Address metadata fields. The problem occurs during device information handling. When a board is connected, the application collects identifying attributes to establish a terminal session. Because strict validation is not enforced for the Serial and Address parameters, an attacker with control over the connected hardware can supply specially crafted strings containing shell metacharacters. The exploitation requires direct physical access to a previously tampered board. When the host system processes these fields, any injected payload is executed with the privileges of the user running arduino-app-lab. This vulnerability is fixed in 0.4.0.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command)

## Which versions are affected by CVE-2026-25933?

It affects 1 product.


Products: Arduino App Lab.

## How do I fix CVE-2026-25933?

No fix has been published for CVE-2026-25933 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-25933 being exploited?

There is no known exploitation of CVE-2026-25933 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-25933 and fix it if it is affected.

What it is: CVE-2026-25933 is a medium-severity command injection vulnerability in arduino-app-lab, published on 12 Feb 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-25933 in the wild and no public exploit code.

Affected product: arduino-app-lab. 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-2026-25933/ (Markdown: https://insights.sbomify.com/CVE-2026-25933/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-25933
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-25933
- OSV: https://osv.dev/vulnerability/CVE-2026-25933

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-25933/
Summaries are generated and may contain mistakes; the official description above is the record.