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    CVE-2021-40546

    Tenda AC6 US_AC6V4.0RTL_V02.03.01.26_cn.bin allows attackers (who have the administrator password) to cause a denial of service (device crash) via a long string in the wifiPwd_5G parameter to /goform/setWifi.

    Published:Sep 5, 2023
    Last Modified:Nov 21, 2024
    EPS:Sep 5, 2023
    EPSS Score:0.00048
    CVSS Score:4.9

    Affected Products

    Vendor
    Tenda
    Product
    Ac6
    Vendor
    Tenda
    Product
    Ac6 Firmware

    Exploits

    https://github.com/doudoudedi/buffer_overflow/blob/main/Tenda%20AC6%20V4.0-Denial%20of%20Service%20Vulnerability.mdhttps://github.com/doudoudedi/buffer_overflow/blob/main/Tenda%20AC6%20V4.0-Denial%20of%20Service%20Vulnerability.md

    Related CVEs

    CVE-2026-8265 (CVSS 2) — A security vulnerability has been detected in Tenda AC6 15.03.06.23. Affected by this issue is the function ge…
    CVE-2026-8264 (CVSS 2.1) — A weakness has been identified in Tenda AC6 15.03.06.23. Affected by this vulnerability is the function formWi…
    CVE-2026-8263 (CVSS 2) — A security flaw has been discovered in Tenda AC6 15.03.06.49_multi_TDE01. Affected is the function fromSetWire…
    CVE-2026-8259 (CVSS 2) — A vulnerability has been found in Tenda AC6 2.0/15.03.06.23. The affected element is an unknown function of th…
    CVE-2025-52221 (CVSS 9.8) — Tenda AC6 15.03.05.16_multi is vulnerable to Buffer Overflow in the formSetCfm function via the funcname, func…
    CVE-2026-4961 (CVSS 7.4) — A vulnerability was identified in Tenda AC6 15.03.05.16. Affected by this vulnerability is the function formQu…
    CVE-2026-4960 (CVSS 7.4) — A vulnerability was determined in Tenda AC6 15.03.05.16. Affected is the function fromWizardHandle of the file…
    CVE-2025-70252 (CVSS 7.5) — An issue was discovered in /goform/WifiWpsStart in Tenda AC6V2.0 V15.03.06.23_multi. The index and mode are co…
    CVE-2025-12225 (CVSS 7.4) — A vulnerability has been found in Tenda AC6 15.03.06.50. This issue affects some unknown processing of the fil…
    CVE-2025-60341 (CVSS 7.5) — Tenda AC6 V2.0 15.03.06.50 was discovered to contain a stack overflow in the ssid parameter in the fast_settin…

    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