# CVE-2026-64827: Telenia TVox 26.5.3 Authentication Bypass via set_env.php

> Attackers can bypass authentication in Telenia TVox by manipulating the PHP_SELF variable to gain unauthenticated access to administrative scripts.

- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 3 Aug 2026
- **Updated:** 7 Aug 2026
- **Also known as:** GHSA-9v39-f83v-66p8

## What is CVE-2026-64827?

CVE-2026-64827 is a critical authentication bypass vulnerability in Telenia Software TVox, published on 3 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

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.

Weakness: CWE-807 (Reliance on Untrusted Inputs in a Security Decision)

## Which versions are affected by CVE-2026-64827?


## How do I fix CVE-2026-64827?

No fix has been published for CVE-2026-64827 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-64827 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-64827 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-64827 and fix it if it is affected.

What it is: CVE-2026-64827 is a critical authentication bypass vulnerability in Telenia Software TVox, published on 3 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-64827 exists.

Affected product: Telenia Software TVox. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-64827/ (Markdown: https://insights.sbomify.com/CVE-2026-64827/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-64827
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-64827
- OSV: https://osv.dev/vulnerability/CVE-2026-64827

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-64827/
Summaries are generated and may contain mistakes; the official description above is the record.