CVE-2019-17391

Severity: medium (CVSS 4.6 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-11-14 · updated 2026-06-17
Weakness: CWE-755

Description

An issue was discovered in the Espressif ESP32 mask ROM code 2016-06-08 0 through 2. Lack of anti-glitch mitigations in the first stage bootloader of the ESP32 chip allows an attacker (with physical access to the device) to read the contents of read-protected eFuses, such as flash encryption and secure boot keys, by injecting a glitch into the power supply of the chip shortly after reset.

Affected products

espressif Esp32-D0Wd Firmware: all versions
espressif Esp32-D2Wd Firmware: all versions
espressif Esp32-Pico-D4 Firmware: all versions
espressif Esp32-S0Wd Firmware: all versions

References

https://www.espressif.com/en/news/Security_Advisory_Concerning_Fault_Injection_and_eFuse_Protections
https://www.espressif.com/en/news/Security_Advisory_Concerning_Fault_Injection_and_eFuse_Protections

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