Bulletin ID: ASEC-25-003
Date: Apr 3, 2025
Product/Component: Arduino-IDE
Affected versions: <= 2.3.4
Fixed version: >= 2.3.5

Summary

A new version of the Arduino IDE (v2.3.5) is now available at the following link: Arduino IDE v2.3.5 Release.

This release includes several improvements and updates, notably:

• Upgrading the underlying Theia IDE to version v1.57.0.
• Updating the Arduino CLI component to version v1.2.0, which addresses multiple security vulnerabilities affecting external components.
• Additionally, this update includes a dedicated security fix for the CVE-2025-27608 vulnerability that affects all Arduino IDE versions before version v2.3.5. Further details are available in the official security advisory at the following link: GHSA-252h-4j5q-88pc.

Specifically, this update mitigates the following Common Vulnerabilities and Exposures (CVEs):

• CVE-2025-21614
• CVE-2025-21613
• CVE-2025-27608

Action Required

To ensure security and stability, users are advised to update Arduino-IDE to version v2.3.5 as soon as possible. This update automatically includes all patches described above.

Update Steps:

1. Download the latest version from the official release page: https://www.arduino.cc/en/software
2. Follow the installation instructions provided in the documentation.
3. Verify that the update was successful.

Additional Information

For further details regarding the resolved vulnerabilities, refer to the following CVE reports:

• Arduino-IDE v2.3.5 Release
• CVE-2025-27608
• GHSA-252h-4j5q-88pc
• Arduino-CLI v1.2.0 Release
• CVE-2025-21614
• CVE-2025-21613

For any questions or support, please refer to the Arduino-IDE GitHub repository or the official support channels.

Contact

If you encounter any issues or have questions regarding this security update, please contact our security team at security@arduino.cc.