CVE-2026-76179

Deferred Deferred - Pending Action

Improper Authentication Token Protection in Ebyte Gateway Products

Publication date: 2026-08-28

Last updated on: 2026-08-31

Assigner: ICS-CERT

Description

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.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-08-28

Last Modified

2026-08-31

Generated

2026-09-17

AI Q&A

2026-08-28

EPSS Evaluated

2026-09-15

NVD

CVE-2026-76179

EUVD

EUVD-2026-67283

Affected Vendors & Products

Vendor	Product	Version / Range
ebyte	gateway	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-598	The web application uses the HTTP GET method to process a request and includes sensitive information in the query string of that request.

Attack-Flow Graph

Executive Summary

This vulnerability involves improper protection of authentication tokens in certain Ebyte gateway products. The web management interface does not sufficiently protect these tokens during client-side session handling, allowing attackers with access to exposed session information to obtain and reuse valid tokens. This could let an attacker impersonate an authenticated user and gain unauthorized access to device management functions.

Detection Guidance

To detect this vulnerability, monitor network traffic for exposed session tokens or unencrypted authentication data. Check web management interfaces for plaintext credential exposure. Use network scanners to identify Ebyte gateway devices and inspect their session handling mechanisms for token reuse risks.

Impact Analysis

An attacker could exploit this to impersonate legitimate users and gain unauthorized access to device management features. This may allow them to modify configurations, disrupt operations, or access sensitive information. The high CVSS scores (9.3 v4.0, 9.8 v3.1) indicate significant potential impact.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive device management functionality, potentially exposing authentication tokens and user credentials. This may result in data breaches or unauthorized data access, which could violate compliance requirements under GDPR (data protection) and HIPAA (healthcare data privacy).

Mitigation Strategies

Minimize network exposure for affected Ebyte gateway devices by isolating them behind firewalls. Use secure remote access methods like VPNs to access device management interfaces. Ensure all communications with the device use transport-layer encryption to prevent interception of authentication tokens.

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