CVE-2019-17391

What it is

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.

At a glance

Exploitability

Can be exploited with physical access without logging in. High risk of data exposure.

Exploit odds

0.2% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2019-11-14 21:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 02:23 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 0.2% in the next 30 days (EPSS).
• Severity: 4.6 MEDIUM (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2019-11-14 21:15 UTC

Last modified

2026-06-17 02:23 UTC

Exploit probability

0.2% · EPSS, next 30 days

Weakness

CWE-755

Record status

Modified

Affected

• Espressif esp32-d0wd Firmware
• Espressif esp32-d2wd Firmware
• Espressif esp32-s0wd Firmware
• Espressif esp32-pico-d4 Firmware

Attack profile CVSS 3.1 · 4.6

Attack vector

Physical

Complexity

Low

Privileges needed

None

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2019-17391.md and follow it. Check whether this project is affected by CVE-2019-17391. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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