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    CVE-2026-26352

    Smoothwall Express versions prior to 3.1 Update 13 contain a stored cross-site scripting vulnerability in the /cgi-bin/vpnmain.cgi script due to improper sanitation of the VPN_IP parameter. Authenticated attackers can inject arbitrary JavaScript through VPN configuration settings that executes when the affected page is viewed by other users.

    Published:Mar 30, 2026
    Last Modified:Apr 15, 2026
    EPS:Mar 30, 2026
    EPSS Score:0.00029
    CVSS Score:5.4

    Affected Products

    Vendor
    Smoothwall
    Product
    Express
    Vendor
    Smoothwall
    Product
    Smoothwall Express

    Exploits

    No exploit reference

    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