CVE-2023-35818: Espressif Esp-Eye Firmware

Medium severity, CVSS 6.8. EPSS: 0.2% chance of exploitation in the next 30 days.

An issue was discovered on Espressif ESP32 3.0 (ESP32_rev300 ROM) devices. An EMFI attack on ECO3 provides the attacker with a capability to influence the PC value at the CPU context level, regardless of Secure Boot and Flash Encryption status. By using this capability, the attacker can exploit another behavior in the chip to gain unauthorized access to the ROM download mode. Access to ROM download mode may be further exploited to read the encrypted flash content in cleartext format or execute stub code.

Affected products

  • Espressif Esp-Eye Firmware: version 3.0 only; version 3.1 only
  • Espressif ESP32-d0wd-v3 Firmware: version 3.0 only; version 3.1 only
  • Espressif ESP32-d0wdr2-v3 Firmware: version 3.0 only; version 3.1 only
  • Espressif ESP32-Devkitc Firmware: version 3.0 only; version 3.1 only
  • Espressif ESP32-Devkitm-1 Firmware: version 3.0 only; version 3.1 only
  • Espressif ESP32-Mini-1 Firmware: version 3.0 only; version 3.1 only
  • Espressif ESP32-Mini-1u Firmware: version 3.0 only; version 3.1 only
  • Espressif ESP32-Pico-d4 Firmware: version 3.0 only; version 3.1 only
  • Espressif ESP32-Pico-Kit Firmware: version 3.0 only; version 3.1 only
  • Espressif ESP32-Pico-Mini-02 Firmware: version 3.0 only; version 3.1 only
  • Espressif ESP32-Pico-Mini-02u Firmware: version 3.0 only; version 3.1 only
  • Espressif ESP32-Pico-v3-02 Firmware: version 3.0 only; version 3.1 only
  • Espressif ESP32-Pico-v3-Zero-Devkit Firmware: version 3.0 only; version 3.1 only
  • Espressif ESP32-Pico-v3-Zero Firmware: version 3.0 only; version 3.1 only
  • Espressif ESP32-Pico-v3 Firmware: version 3.0 only; version 3.1 only
  • Espressif ESP32-u4wdh Firmware: version 3.0 only; version 3.1 only
  • Espressif ESP32-Vaquita-Dspg Firmware: version 3.0 only; version 3.1 only
  • Espressif ESP32-Wroom-32e Firmware: version 3.0 only; version 3.1 only
  • Espressif ESP32-Wroom-32ue Firmware: version 3.0 only; version 3.1 only
  • Espressif ESP32-Wroom-Da Firmware: version 3.0 only; version 3.1 only
  • Espressif ESP32-Wrover-E Firmware: version 3.0 only; version 3.1 only
  • Espressif ESP32-Wrover-Ie Firmware: version 3.0 only; version 3.1 only

Published 2023-07-17. Last modified 2026-06-17.