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    CVE-2023-7221

    A vulnerability was found in Totolink T6 4.1.9cu.5241_B20210923. It has been classified as critical. This affects the function main of the file /cgi-bin/cstecgi.cgi?action=login of the component HTTP POST Request Handler. The manipulation of the argument v41 leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The associated identifier of this vulnerability is VDB-249855. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

    Published:Jan 9, 2024
    Last Modified:May 14, 2025
    EPS:Jan 9, 2024
    EPSS Score:0.00286
    CVSS Score:9.8

    Affected Products

    Vendor
    Totolink
    Product
    T6
    Vendor
    Totolink
    Product
    T6 Firmware

    Exploits

    https://github.com/jylsec/vuldb/blob/main/TOTOLINK/T6/1/README.mdhttps://github.com/jylsec/vuldb/blob/main/TOTOLINK/T6/1/README.md

    Related CVEs

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    CVE-2026-51751 (CVSS 9.8) — Incorrect access control in the delSlaveDevice function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenti…
    CVE-2026-51745 (CVSS 5.3) — Incorrect access control in the updatePriStaList function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthen…
    CVE-2026-51744 (CVSS 9.8) — Incorrect access control in the recv_mesh_info_sync function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unaut…
    CVE-2026-51756 (CVSS 5.9) — Incorrect access control in the meshSlaveUpgfw function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenti…
    CVE-2026-51750 (CVSS 9.8) — Incorrect access control in the updatePriChannel function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthen…
    CVE-2026-51752 (CVSS 5.3) — Incorrect access control in the staticInfoSend function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenti…
    CVE-2026-51747 (CVSS 9.8) — Incorrect access control in the keepAlive function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated…
    CVE-2026-51748 (CVSS 5.9) — Incorrect access control in the sendStaticInfoToMaster function of TOTOLINK T6 4.1.5cu.748_B20211015 allows un…
    CVE-2026-51743 (CVSS 9.1) — Incorrect access control in the guest_wifi_sync function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthent…

    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