---
id: CVE-2026-64827
title: >-
  Telenia Software TVox 26.5.3 and prior 26.x versions, and 24.9.21 and prior
  24.x versions, contain an authentication bypass vulnerability in set_env.php
  where the redirectToLoginAdminIRequestHaveAccessToken() function derives the
  current…
summary: >-
  Telenia Software TVox 26.5.3 and prior 26.x versions, and 24.9.21 and prior
  24.x versions, contain an authentication bypass vulnerability in set_env.php
  where the redirectToLoginAdminIRequestHaveAccessToken() function derives the
  current…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-807
vendor: Telenia Software
product: TVox
affected:
  - TVox >= 26.0.0 <= 26.5.3
  - TVox >= 24.0.0 <= 24.9.21
published: '2026-08-03'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T20:40:01.933'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-64827'
references:
  - url: 'https://karmainsecurity.com/KIS-2026-14'
    label: disclosure@vulncheck.com
  - url: 'https://www.teleniasoftware.com/'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/telenia-tvox-authentication-bypass-via-set-env-php
    label: disclosure@vulncheck.com
  - url: 'http://seclists.org/fulldisclosure/2026/Aug/30'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-08-03T14:27:45.340772Z'
ingestedAt: '2026-09-13T04:28:20.015Z'
epss: 0.0083
epssPercentile: 0.55697
---

## Overview

Telenia Software TVox 26.5.3 and prior 26.x versions, and 24.9.21 and prior 24.x versions, contain an authentication bypass vulnerability in set_env.php where the redirectToLoginAdminIRequestHaveAccessToken() function derives the current page name from PHP_SELF and skips authentication when the value matches 'login_admin.php'. Attackers can append '/login_admin.php' to the path of any target PHP script to cause the authentication check to pass and gain unauthenticated access to all PHP scripts under the manager HTML directory.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.