CVE-2019-12586: Espressif Arduino-ESP32

Medium severity, CVSS 6.5. EPSS: 1.5% chance of exploitation in the next 30 days.

The EAP peer implementation in Espressif ESP-IDF 2.0.0 through 4.0.0 and ESP8266_NONOS_SDK 2.2.0 through 3.1.0 processes EAP Success messages before any EAP method completion or failure, which allows attackers in radio range to cause a denial of service (crash) via a crafted message.

Affected products

• Espressif Arduino-ESP32: up to and including 1.0.2; version 1.0.3 only
• Espressif Esp-Idf: from 2.0.0, up to and including 4.0.0
• Espressif ESP8266 Nonos SDK: from 2.2.0, up to and including 3.0.0

Published 2019-09-04. Last modified 2026-06-17.