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    CVE-2021-35393

    Realtek Jungle SDK version v2.x up to v3.4.14B provides a 'WiFi Simple Config' server that implements both UPnP and SSDP protocols. The binary is usually named wscd or mini_upnpd and is the successor to miniigd. The server is vulnerable to a stack buffer overflow vulnerability that is present due to unsafe parsing of the UPnP SUBSCRIBE/UNSUBSCRIBE Callback header. Successful exploitation of this vulnerability allows remote unauthenticated attackers to gain arbitrary code execution on the affected device.

    Published:Aug 16, 2021
    Last Modified:Aug 13, 2025
    EPS:Aug 16, 2021
    EPSS Score:0.11737
    CVSS Score:9.8

    Affected Products

    Vendor
    Realtek
    Product
    Rtl819x Jungle Software Development Kit

    Exploits

    https://www.iot-inspector.com/blog/advisory-multiple-issues-realtek-sdk-iot-supply-chainhttps://www.iot-inspector.com/blog/advisory-multiple-issues-realtek-sdk-iot-supply-chain

    Common Weakness Enumeration

    CWE-787 Out-of-bounds Write

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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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