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    CVE-2021-46393

    There is a stack buffer overflow vulnerability in the formSetPPTPServer function of Tenda-AX3 router V16.03.12.10_CN. The v10 variable is directly retrieved from the http request parameter startIp. Then v10 will be splice to stack by function sscanf without any security check,which causes stack overflow. By POSTing the page /goform/SetPptpServerCfg with proper startIp, the attacker can easily perform remote code execution with carefully crafted overflow data.

    Published:Mar 4, 2022
    Last Modified:Nov 21, 2024
    EPS:Mar 4, 2022
    EPSS Score:0.03509
    CVSS Score:9.8

    Affected Products

    Vendor
    Tenda
    Product
    Ax3
    Vendor
    Tenda
    Product
    Ax3 Firmware

    Exploits

    https://github.com/sec-bin/IoT-CVE/tree/main/Tenda/AX3/3https://github.com/sec-bin/IoT-CVE/tree/main/Tenda/AX3/3

    Common Weakness Enumeration

    CWE-787 Out-of-bounds Write

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2025-69765 (CVSS 7.5) — Tenda AX3 firmware v16.03.12.11 contains a stack overflow in formGetIptv function and the list parameter, whic…
    CVE-2025-69764 (CVSS 9.8) — Tenda AX3 firmware v16.03.12.11 contains a stack-based buffer overflow in the formGetIptv function due to impr…
    CVE-2025-69762 (CVSS 9.8) — Tenda AX3 firmware v16.03.12.11 contains a stack overflow in formSetIptv via the list parameter, which can cau…
    CVE-2025-69763 (CVSS 9.8) — Tenda AX3 firmware v16.03.12.11 contains a stack overflow in formSetIptv via the vlanId parameter, which can c…
    CVE-2025-69766 (CVSS 9.8) — Tenda AX3 firmware v16.03.12.11 contains a stack-based buffer overflow in the formGetIptv function due to impr…
    CVE-2025-71026 (CVSS 7.5) — Tenda AX-3 v16.03.12.10_CN was discovered to contain a stack overflow in the wanSpeed2 parameter of the fromAd…
    CVE-2025-71023 (CVSS 7.5) — Tenda AX-3 v16.03.12.10_CN was discovered to contain a stack overflow in the mac2 parameter of the fromAdvSetM…
    CVE-2025-71027 (CVSS 7.5) — Tenda AX-3 v16.03.12.10_CN was discovered to contain a stack overflow in the wanMTU2 parameter of the fromAdvS…
    CVE-2025-71024 (CVSS 7.5) — Tenda AX-3 v16.03.12.10_CN was discovered to contain a stack overflow in the serviceName2 parameter of the fro…
    CVE-2025-71025 (CVSS 7.5) — Tenda AX-3 v16.03.12.10_CN was discovered to contain a stack overflow in the cloneType2 parameter of the fromA…

    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