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    CVE-2021-42757

    A buffer overflow [CWE-121] in the TFTP client library of FortiOS before 6.4.7 and FortiOS 7.0.0 through 7.0.2, may allow an authenticated local attacker to achieve arbitrary code execution via specially crafted command line arguments.

    Published:Dec 8, 2021
    Last Modified:Oct 16, 2025
    EPS:Dec 8, 2021
    EPSS Score:0.00082
    CVSS Score:6.3

    Affected Products

    Vendor
    Fortinet
    Product
    Fortiadc
    Vendor
    Fortinet
    Product
    Fortianalyzer
    Vendor
    Fortinet
    Product
    Fortiddos
    Vendor
    Fortinet
    Product
    Fortiddos-f
    Vendor
    Fortinet
    Product
    Fortimail
    Vendor
    Fortinet
    Product
    Fortimanager
    Vendor
    Fortinet
    Product
    Fortindr
    Vendor
    Fortinet
    Product
    Fortios
    Vendor
    Fortinet
    Product
    Fortios-6k7k
    Vendor
    Fortinet
    Product
    Fortiportal
    Vendor
    Fortinet
    Product
    Fortiproxy
    Vendor
    Fortinet
    Product
    Fortirecorder
    Vendor
    Fortinet
    Product
    Fortirecorder Firmware
    Vendor
    Fortinet
    Product
    Fortiswitch
    Vendor
    Fortinet
    Product
    Fortivoice
    Vendor
    Fortinet
    Product
    Fortiweb

    Exploits

    No exploit reference

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    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