CVE-2019-13991: Arduino Firmware

Medium severity, CVSS 6.5. EPSS: 0.7% chance of exploitation in the next 30 days.

Embedded systems based on Arduino before Rev3 allow remote attackers to send data to LEDs (directly connected to GPIO pins) via a laser, because of LED photosensitivity.

Affected products

• Arduino Arduino Firmware: before rev3 (fixed in rev3)

Published 2019-07-19. Last modified 2026-06-17.