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.
- 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
- None listed
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
Which versions are affected by CVE-2026-25933?
It affects 1 product.
Products include 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.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-25933 being exploited?
There is no known exploitation of CVE-2026-25933 in the wild and no public exploit code.
Sources
Also known as GHSA-3652-939f-f7g4.