# CVE-2026-124006: Dixell/Copeland XWEB EVO Predictable Root Password Generation

> Attackers can derive the root password of XWEB EVO controllers and gain root access to the underlying OS; operators of these end-of-service units should care.

- **Severity:** Critical 9.2 (`CVSS:4.0/AV:N/AC:L/AT:P/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
- **Harmful if only installed:** No
- **Needs a specific call:** No
- **Fix available:** No
- **Published:** 12 Nov 2026
- **Updated:** 12 Nov 2026
- **Also known as:** GHSA-hp68-2m45-hqr3

## What is CVE-2026-124006?

CVE-2026-124006 is a critical weak cryptography vulnerability in Copeland XWEB EVO, published on 12 Nov 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

XWEB EVO through 5.8.8 contains a predictable credential generation vulnerability that allows attackers to derive the Linux root password by computing a fixed prefix combined with a daily password value. Attackers can calculate the deterministic root credential, which before 5.7.0 was identical across all units and from 5.7.0 onward remains derivable from the MAC-based daily password, to gain unauthorized root access to the underlying operating system. This product line reached it's end of service date in March 2026.

Weakness: CWE-798 (Use of Hard-coded Credentials), CWE-1392 (Use of Default Credentials)

## Which versions are affected by CVE-2026-124006?

An affected version is exposed as installed. No special setting or call is needed.


## How do I fix CVE-2026-124006?

No fix has been published for CVE-2026-124006 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-124006 being exploited?

There is no known exploitation of CVE-2026-124006 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-124006 and fix it if it is affected.

What it is: CVE-2026-124006 is a critical weak cryptography vulnerability in Copeland XWEB EVO, published on 12 Nov 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-124006 in the wild and no public exploit code.
Exposure: An affected version is exposed as installed. No special setting or call is needed.

Affected product: Copeland XWEB EVO. 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-2026-124006/ (Markdown: https://insights.sbomify.com/CVE-2026-124006/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-124006
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-124006
- OSV: https://osv.dev/vulnerability/CVE-2026-124006

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-124006/
Summaries are generated and may contain mistakes; the official description above is the record.