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    CVE-2026-19812

    A weakness has been identified in TOTOLINK A800R 4.1.2cu.5137_B20200730. This affects the function UploadCustomModule of the file /cgi-bin/cstecgi.cgi of the component product.so. This manipulation of the argument File causes stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks.

    Published:Aug 14, 2026
    Last Modified:Aug 14, 2026
    EPS:Aug 14, 2026
    EPSS Score:0.00493
    CVSS Score:8.8

    Affected Products

    Vendor
    Totolink
    Product
    A800r
    Vendor
    Totolink
    Product
    A800r Firmware

    Exploits

    No exploit reference

    Related CVEs

    CVE-2026-19847 (CVSS 7.4) — A security flaw has been discovered in TOTOLINK A800R 4.1.2cu.5137_B20200730. Affected is the function setWiFi…
    CVE-2026-19846 (CVSS 7.4) — A vulnerability was identified in TOTOLINK A800R 4.1.2cu.5137_B20200730. This impacts the function setUrlFilte…
    CVE-2026-19845 (CVSS 7.4) — A vulnerability was determined in TOTOLINK A800R 4.1.2cu.5137_B20200730. This affects the function setStaticDh…
    CVE-2026-19844 (CVSS 7.4) — A vulnerability was found in TOTOLINK A800R 4.1.2cu.5137_B20200730. The impacted element is the function setRa…
    CVE-2026-19815 (CVSS 7.4) — A flaw has been found in TOTOLINK A800R 4.1.2cu.5137_B20200730. Affected by this vulnerability is the function…
    CVE-2026-19814 (CVSS 7.4) — A vulnerability was detected in TOTOLINK A800R 4.1.2cu.5137_B20200730. Affected is the function setMacQos of t…
    CVE-2026-19813 (CVSS 7.4) — A security vulnerability has been detected in TOTOLINK A800R 4.1.2cu.5137_B20200730. This impacts the function…
    CVE-2026-19811 (CVSS 7.4) — A security flaw has been discovered in TOTOLINK A800R 4.1.2cu.5137_B20200730. The impacted element is the func…
    CVE-2026-6157 (CVSS 7.4) — A vulnerability was detected in Totolink A800R 4.1.2cu.5137_B20200730. This impacts the function setAppEasyWiz…
    CVE-2025-4496 (CVSS 8.7) — A vulnerability was found in TOTOLINK T10, A3100R, A950RG, A800R, N600R, A3000RU and A810R 4.1.8cu.5241_B20210…

    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