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    CVE-2021-42659

    There is a buffer overflow vulnerability in the Web server httpd of the router in Tenda router devices such as Tenda AC9 V1.0 V15.03.02.19(6318) and Tenda AC9 V3.0 V15.03.06.42_multi. When setting the virtual service, the httpd program will crash and exit when the super-long list parameter occurs.

    Published:May 24, 2022
    Last Modified:Nov 21, 2024
    EPS:May 24, 2022
    EPSS Score:0.00205
    CVSS Score:6.5

    Affected Products

    Vendor
    Tenda
    Product
    Ac9
    Vendor
    Tenda
    Product
    Ac9 Firmware

    Exploits

    https://github.com/Lyc-heng/routers/blob/main/routers/stack4.mdhttps://github.com/Lyc-heng/routers/blob/main/routers/stack4.md

    Related CVEs

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    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