CVE-2026-102693

RIOT is an open-source microcontroller operating system designed for Internet of Things devices and other embedded systems. Prior to 2026.04, the ATWINC15x0 driver's atwinc15x0 sta set current ssid function uses strcpy to copy an SSID without checking the destination size. When MODULE ATWINC15X0 DYNAMIC CONNECT is enabled, a nearby attacker can advertise a malformed or oversized SSID that is processed during Wi-Fi scanning, causing memory corruption and potentially a hard fault, denial of service, or code execution. This issue is fixed in version 2026.04.