# CVE-2026-124009: Dixell/Copeland XWEB EVO OS Command Injection via backup.lua

> Authenticated attackers can run root commands on XWEB EVO controllers via the backup output path, fully compromising the system.

- **Severity:** High 8.6 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **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-pxcj-mc47-xhg9

## What is CVE-2026-124009?

CVE-2026-124009 is a high-severity command injection vulnerability in Copeland XWEB EVO, published on 12 Nov 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

XWEB EVO 5.2.3 through 5.8.8 contains an authenticated OS command injection vulnerability that allows authenticated attackers to execute arbitrary commands as root by injecting shell metacharacters into the output device path parameter processed by backup.lua. Attackers can exploit the unescaped concatenation into mount, unzip, and related shell commands run via the wlua interpreter, including through the setuid xwbackup.cgi and xwrestore.cgi interfaces, to achieve full system compromise. This product line reached it's end of service date in March 2026.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command)

## Which versions are affected by CVE-2026-124009?

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


## How do I fix CVE-2026-124009?

No fix has been published for CVE-2026-124009 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-124009 being exploited?

There is no known exploitation of CVE-2026-124009 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-124009 and fix it if it is affected.

What it is: CVE-2026-124009 is a high-severity command injection vulnerability in Copeland XWEB EVO, published on 12 Nov 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-124009 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-2026-124009/ (Markdown: https://insights.sbomify.com/CVE-2026-124009/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-124009
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-124009
- OSV: https://osv.dev/vulnerability/CVE-2026-124009

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-124009/
Summaries are generated and may contain mistakes; the official description above is the record.