CVE-2026-41429

arduino-esp32 is an Arduino core for the ESP32, ESP32-S2, ESP32-S3, ESP32-C3, ESP32-C6 and ESP32-H2 microcontrollers. Prior to 3.3.8, there is a remotely reachable memory corruption issue in the NBNS packet handling path. When NetBIOS is enabled by calling NBNS.begin..., the device listens on UDP...

CVE-2026-41429

CVE-2026-41429 affects the arduino-esp32 core (ESP32/ESP32-S2/ESP32-S3/ESP32-C3/ESP32-C6/ESP32-H2). The issue is a memory corruption in NBNS packet handling when NetBIOS is enabled via NBNS.begin(...); the code path listens on UDP port 137 and processes untrusted NBNS requests. The request parser...