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    CVE-2026-119425

    OPNsense core 26.1.6 through 26.7.7 contains an authentication bypass vulnerability in the captive portal roaming feature that lets unauthenticated attackers hijack authorized client sessions by spoofing unauthenticated MAC-to-IP observations. Attackers on the same Layer-2 segment can send forged gratuitous ARP replies binding their IP to a victim's MAC, gaining portal access with traffic attributed to the victim.

    Published:Oct 30, 2026
    Last Modified:Oct 30, 2026
    EPS:Oct 30, 2026
    EPSS Score:
    CVSS Score:5.4

    Affected Products

    Vendor
    Opnsense
    Product
    Core
    Vendor
    Opnsense
    Product
    Opnsense

    Exploits

    No exploit reference

    Related CVEs

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    CVE-2026-119560 (CVSS 6) — OPNsense core through 26.7.8 contains a configuration injection vulnerability that allows authenticated users …
    CVE-2026-119424 (CVSS 6.1) — OPNsense core before 26.7.8 contains a configuration line injection vulnerability that allows authenticated us…
    CVE-2026-119423 (CVSS 6.9) — OPNsense core before 26.7.8 contains a log injection vulnerability that allows unauthenticated attackers to pl…
    CVE-2026-119409 (CVSS 8.6) — OPNsense before 26.7.8 contains a command injection vulnerability that allows authenticated users with the Sys…
    CVE-2026-71490 (CVSS 7.1) — OPNsense is a FreeBSD based firewall and routing platform. Prior to 26.1.11, OPNsense\Core\ACL::hasPrivilege()…
    CVE-2026-63442 (CVSS 8.1) — OPNsense is a FreeBSD based firewall and routing platform. Prior to version 26.1.11, the unauthenticated WebGU…
    CVE-2026-58390 (CVSS 8) — OPNsense is a FreeBSD based firewall and routing platform. Prior to version 26.1.11, the OpenVPN connection-st…
    CVE-2026-58394 (CVSS 5.2) — OPNsense is a FreeBSD based firewall and routing platform. Prior to version 26.1.11, src/www/system_advanced_a…
    CVE-2026-58392 (CVSS 5.4) — OPNsense is a FreeBSD based firewall and routing platform. Prior to version 26.1.11, the NTP GPS page stores t…

    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