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    CVE-2020-26728

    A vulnerability was discovered in Tenda AC9 v3.0 V15.03.06.42_multi and Tenda AC9 V1.0 V15.03.05.19(6318)_CN which allows for remote code execution via shell metacharacters in the guestuser field to the __fastcall function with a POST request.

    Published:Feb 11, 2022
    Last Modified:Nov 21, 2024
    EPS:Feb 11, 2022
    EPSS Score:0.03387
    CVSS Score:9.8

    Affected Products

    Vendor
    Tenda
    Product
    Ac9
    Vendor
    Tenda
    Product
    Ac9 Firmware

    Exploits

    https://github.com/Lyc-heng/routers/blob/a80b30bccfc9b76f3a4868ff28ad5ce2e0fca180/routers/rce1.mdhttps://github.com/Lyc-heng/routers/blob/main/routers/rce1.mdhttps://github.com/Lyc-heng/routers/blob/a80b30bccfc9b76f3a4868ff28ad5ce2e0fca180/routers/rce1.mdhttps://github.com/Lyc-heng/routers/blob/main/routers/rce1.md

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-86300 (CVSS 5.5) — A flaw has been found in Tenda AC9 15.03.05.14. This impacts the function R7WebsSecurityHandler of the compone…
    CVE-2026-6016 (CVSS 7.4) — A vulnerability was found in Tenda AC9 15.03.02.13. The affected element is the function decodePwd of the file…
    CVE-2026-6015 (CVSS 7.4) — A vulnerability has been found in Tenda AC9 15.03.02.13. Impacted is the function formQuickIndex of the file /…
    CVE-2026-2192 (CVSS 7.3) — A security vulnerability has been detected in Tenda AC9 15.03.06.42_multi. Affected by this vulnerability is t…
    CVE-2026-2191 (CVSS 7.3) — A weakness has been identified in Tenda AC9 15.03.06.42_multi. Affected is the function formGetDdosDefenceList…
    CVE-2025-14286 (CVSS 5.5) — A vulnerability was determined in Tenda AC9 15.03.05.14_multi. Affected by this vulnerability is an unknown fu…
    CVE-2025-57638 (CVSS 7.5) — Buffer overflow vulnerability in Tenda AC9 1.0 via the user supplied sys.vendor configuration value.…
    CVE-2025-57639 (CVSS 6.5) — OS Command injection vulnerability in Tenda AC9 1.0 was discovered to contain a command injection vulnerabilit…
    CVE-2025-10443 (CVSS 7.4) — A vulnerability was identified in Tenda AC9 and AC15 15.03.05.14/15.03.05.18. This vulnerability affects the f…
    CVE-2025-10442 (CVSS 2.1) — A vulnerability was determined in Tenda AC9 and AC15 15.03.05.14. This affects the function formexeCommand of …

    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