Check Point Advisories

AdGuardHome Authentication Bypass (CVE-2026-41448)

Check Point Reference: CPAI-2026-10389
Date Published: 30 Aug 2026
Severity: High
Last Updated: Sunday 30 August, 2026
Source:
Industry Reference:CVE-2026-41448
Protection Provided by:

Security Gateway
R81, R80, R77, R75
Who is Vulnerable? AdguardTeam AdGuardHome prior to 0.107.77
Vulnerability Description An authentication bypass vulnerability in AdguardTeam AdGuardHome allows unauthenticated attackers to gain full admin access by supplying a path traversal sequence in the Admin-Token cookie, exploiting unsanitized string concatenation in the token file path construction within the authglinet middleware. Attackers can craft a request with a traversal payload in the Admin-Token header to redirect file reads to arbitrary paths.

Protection Overview

This protection detects attempts to exploit this vulnerability.

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R81 / R80 / R77 / R75

  1. In the IPS tab, click Protections and find the AdGuardHome Authentication Bypass (CVE-2026-41448) protection using the Search tool and Edit the protection's settings.
  2. Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name:  Application Servers Protection Violation.
Attack Information:  AdGuardHome Authentication Bypass (CVE-2026-41448)

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