An improper protection of authentication tokens vulnerability exists in certain Ebyte gateway products. Authentication tokens used by the web management interface are insufficiently protected during client-side session handling, which may allow an attacker with access to exposed session information to obtain and reuse a valid token. Successful exploitation could allow an attacker to impersonate an authenticated user and gain unauthorized access to device management functionality.

A vulnerability has been identified in certain Ebyte gateway products involving improper protection of authentication tokens used by the web management interface. The tokens are insufficiently protected during client-side session handling, exposing them to potential interception or access by attackers. An attacker who gains access to the exposed session information could obtain and reuse a valid authentication token. Successful exploitation would allow the attacker to impersonate a legitimately authenticated user. This could result in unauthorized access to device management functionality within the affected Ebyte gateway products. The vulnerability is tracked as CVE-2026-76179 and has been reported via both NVD and a CISA ICS advisory (ICSA-26-237-06). It falls under the CWE category of improper protection of credentials or session tokens. The issue is particularly relevant to operational technology (OT) environments where gateway devices are commonly deployed. Mitigation guidance is expected to be available through the referenced CISA advisory.