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    CVE-2025-12240

    A security vulnerability has been detected in TOTOLINK A3300R 17.0.0cu.557_B20221024. This affects the function setDmzCfg of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument ip leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed publicly and may be used.

    Published:Oct 27, 2025
    Last Modified:Oct 27, 2025
    EPS:Oct 27, 2025
    EPSS Score:0.00077
    CVSS Score:8.8

    Affected Products

    Vendor
    Totolink
    Product
    A3300r
    Vendor
    Totolink
    Product
    A3300r Firmware

    Exploits

    https://github.com/noahze01/IoT-vulnerable/blob/main/TOTOLink/A3300R/setDmzCfg.md

    Related CVEs

    CVE-2026-31159 (CVSS 6.5) — An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbi…
    CVE-2026-31160 (CVSS 6.5) — An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbi…
    CVE-2026-31162 (CVSS 6.5) — An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbi…
    CVE-2026-31177 (CVSS 9.8) — An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbi…
    CVE-2026-31168 (CVSS 6.5) — An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbi…
    CVE-2026-31163 (CVSS 6.5) — An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbi…
    CVE-2026-31167 (CVSS 6.5) — An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbi…
    CVE-2026-31178 (CVSS 9.8) — An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbi…
    CVE-2026-31181 (CVSS 9.8) — An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbi…
    CVE-2026-31174 (CVSS 6.5) — An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbi…

    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