# Vulnerabilities

This page briefly lists all of the vulnerabilities that are discovered and fixed in each release. Please note that for the on-going issues or the issues under embargo period, the information on this page may reflect once the desired resolution has been achieved.

Note

Please refer to `latest` version of this documentation guide for up-to-date information.

## CVE-2026

### CVE-2026-25532

WPS Enrollee Fragment Integer Underflow Vulnerability

- Espressif Advisory: NA (Published on GitHub)

- Impact: Applicable for ESP-IDF

- Resolution: Please see advisory for details

- Advisory pointer: GHSA-m2h2-683f-9mw7

## CVE-2025

### CVE-2025-55297

BluFi Example Memory Overflow Vulnerability

- Espressif Advisory: NA (Published on GitHub)

- Impact: Applicable for ESP-IDF

- Resolution: Please see advisory for details

- Advisory pointer: GHSA-9w88-r2vm-qfc4

### CVE-2025-52471

ESP-NOW Integer Underflow Vulnerability Advisory

- Espressif Advisory: NA (Published on GitHub)

- Impact: Applicable for ESP-IDF

- Resolution: Please see advisory for details

- Advisory pointer: GHSA-hqhh-cp47-fv5g

## CVE-2024

### CVE-2024-53845

AES/CBC Constant IV Vulnerability in ESPTouch v2

- Espressif Advisory: NA (Published on GitHub)

- Impact: Applicable for ESP-IDF

- Resolution: Please see advisory for details

- Advisory pointer: GHSA-wm57-466g-mhrr

### CVE-2024-28183

Bootloader TOCTOU Vulnerability in Anti-rollback Scheme

- Espressif Advisory: NA (Published on GitHub)

- Impact: Applicable for ESP-IDF

- Resolution: Please see advisory for details

- Advisory pointer: GHSA-22x6-3756-pfp8

## CVE-2023

### CVE-2023-35818

Security Advisory Concerning Bypassing Secure Boot and Flash Encryption Using EMFI

- Espressif Advisory: AR2023-005

- Impact: Applicable for ESP32 Chip Revision v3.0/v3.1

- Resolution: Please see advisory for details

### CVE-2023-24023

Security Advisory Concerning the Bluetooth BLUFFS Vulnerability

- Espressif Advisory: AR2023-010

- Impact: Applicable for ESP-IDF

- Resolution: Please see advisory for details

## CVE-2022

### CVE-2022-24893

Espressif Bluetooth Mesh Stack Vulnerability

- Espressif Advisory: NA (Published on GitHub)

- Impact: Applicable for ESP-IDF

- Resolution: Please see advisory for details

- Advisory pointer: GHSA-7f7f-jj2q-28wm

## CVE-2021

### CVE-2021-32020

Insufficient bounds checking during management of heap memory in FreeRTOS

- Impact: ESP-IDF uses its own heap allocator and hence not applicable

- Resolution: NA

### CVE-2021-43997

Privilege escalation issue in FreeRTOS ARMv7-M and ARMv8-M MPU ports

- Impact: Not applicable for Espressif chips

- Resolution: NA

### CVE-2021-3420

Security Advisory on "BadAlloc" Vulnerabilities

- Espressif Advisory: AR2021-005

- Impact: Not applicable for ESP-IDF

- Resolution: NA

### CVE-2021-31571

Security Advisory on "BadAlloc" Vulnerabilities

- Espressif Advisory: AR2021-005

- Impact: Applicable for ESP-IDF

- Resolution: Please see advisory for details

### CVE-2021-31572

Security Advisory on "BadAlloc" Vulnerabilities

- Espressif Advisory: AR2021-005

- Impact: Applicable for ESP-IDF

- Resolution: Please see advisory for details

### CVE-2021-28139

Security Advisory for Bluetooth Vulnerability

- Covers additional CVEs: CVE-2020-10135, CVE-2020-13595, CVE-2020-26555, CVE-2020-26556, CVE-2020-26557, CVE-2020-26558, CVE-2020-26559, CVE-2020-26560, CVE-2021-28135, CVE-2021-28136

- Espressif Advisory: AR2021-004

- Impact: Applicable for ESP-IDF

- Resolution: Please see advisory for details

## CVE-2020

### CVE-2020-22283

Buffer overflow vulnerability in lwIP stack

- Espressif Advisory: NA

- Impact: Applicable for ESP-IDF

- Resolution: Fix cherry-picked and available in ESP-IDF >= v4.4.1

### CVE-2020-22284

Buffer overflow vulnerability in lwIP stack

- Espressif Advisory: NA

- Impact: Applicable for ESP-IDF

- Resolution: Fix cherry-picked and available in ESP-IDF >= v4.4.1

### CVE-2020-26142

Security Advisory for WLAN FragAttacks

- Espressif Advisory: AR2023-008

- Impact: Applicable for ESP-IDF

- Resolution: Please see advisory for details

### CVE-2020-12638

Security Advisory Concerning Wi-Fi Authentication Bypass

- Espressif Advisory: AR2020-002

- Impact: Applicable for ESP-IDF

- Resolution: Please see advisory for details

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