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    CVE-2020-12638

    An encryption-bypass issue was discovered on Espressif ESP-IDF devices through 4.2, ESP8266_NONOS_SDK devices through 3.0.3, and ESP8266_RTOS_SDK devices through 3.3. Broadcasting forged beacon frames forces a device to change its authentication mode to OPEN, effectively disabling its 802.11 encryption.

    Published:Jul 23, 2020
    Last Modified:Nov 21, 2024
    EPS:Jul 23, 2020
    EPSS Score:0.0004
    CVSS Score:6.8

    Affected Products

    Vendor
    Espressif
    Product
    Esp-idf
    Vendor
    Espressif
    Product
    Esp8266 Nonos Sdk
    Vendor
    Espressif
    Product
    Esp8266 Rtos Sdk

    Exploits

    https://lbsfilm.at/blog/wpa2-authenticationmode-downgrade-in-espressif-microprocessorshttps://lbsfilm.at/blog/wpa2-authenticationmode-downgrade-in-espressif-microprocessors

    Related CVEs

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    CVE-2026-45329 (CVSS 7.1) — ESF-IDF is the Espressif Internet of Things (IOT) Development Framework. In versions 5.5.4 and 6.0, several ES…
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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High