Is CVE-2026-119425 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-119425?

CVE-2026-119425 has a CVSS v3 severity of MEDIUM (5.4).

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CVE-2026-119425

Description

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.