---
id: "CVE-2026-124004"
page: "https://infrastack.ai/live/CVE-2026-124004"
kind: "vulnerability"
aliases: ["CVE-2026-124004"]
title: "XWEB EVO: hardcoded backdoor password grants unauthenticated full administrator access"
severity: "critical"
cvss: 9.8
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["other", "self-hosted", "xweb-evo"]
not_affected_if: ["not-exposed-to-network", "xweb-evo-5.6.2-or-later"]
published_at: "2026-11-12T20:18:22+00:00"
first_seen_at: "2026-11-12T20:40:23+00:00"
updated_at: "2026-11-12T20:41:48+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-124004", "first_seen_at": "2026-11-12T20:40:23+00:00"}]
exploit_sources: []
---

# XWEB EVO: hardcoded backdoor password grants unauthenticated full administrator access

Link for people: https://infrastack.ai/live/CVE-2026-124004 (this .md is for agents)

XWEB EVO versions before 5.6.2 ship a built-in Administrator account with a hardcoded password. An unauthenticated remote attacker can log in with that credential and get a full admin session over the application.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Look for the XWEB EVO application and note its version; the sources state it is affected before `5.6.2`.
- Check whether the Administrator account still accepts the default credential, if your vendor documents it.

## Fix

- XWEB EVO: move to `5.6.2` or later, per the sources. The product line has reached end of service in March 2026, so a fixed release may not be available for every installation.

## Timeline

- 2026-11-12T20:40:23+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-124004

## Documents

- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/dixell-copeland-xweb-evo-hardcoded-administrator-backdoor-password

## From the sources

XWEB EVO before 5.6.2 contains a hardcoded backdoor password vulnerability that allows unauthenticated remote attackers to gain full administrative access to the built-in Administrator account. Attackers can authenticate using the hardcoded credential xwebevonewgeneration in a single request to obtain a complete admin session and full control over the application. This product line reached it's end of service date in March 2026.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_