# CVE-2026-25134: Group-Office Argument Injection in MaintenanceController::actionZipLanguage

> Attackers can achieve remote code execution in Group-Office by injecting arguments into a system zip command via the lang parameter.

- **Severity:** Critical 9.4 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 2 Feb 2026
- **Updated:** 4 Feb 2026
- **Also known as:** GHSA-v39j-549w-8849

## What is CVE-2026-25134?

CVE-2026-25134 is a critical command injection vulnerability in Intermesh groupoffice, published on 2 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Group-Office is an enterprise customer relationship management and groupware tool. Prior to 6.8.150, 25.0.82, and 26.0.5, the MaintenanceController exposes an action zipLanguage which takes a lang parameter and passes it directly to a system zip command via exec(). This can be combined with uploading a crafted zip file to achieve remote code execution. This vulnerability is fixed in 6.8.150, 25.0.82, and 26.0.5.

Weakness: CWE-88 (Improper Neutralization of Argument Delimiters in a Command)

## Which versions are affected by CVE-2026-25134?

It affects 1 product.


Products: Group-Office Group Office.

## How do I fix CVE-2026-25134?

No fix has been published for CVE-2026-25134 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-25134 being exploited?

There is no known exploitation of CVE-2026-25134 in the wild and no public exploit code.

## Other vulnerabilities in Intermesh groupoffice

- [CVE-2026-25512](https://insights.sbomify.com/CVE-2026-25512/): Group-Office is vulnerable to RCE due to Command Injection via TNEF Attachment Handler (critical 9.4)
- [CVE-2025-63406](https://insights.sbomify.com/CVE-2025-63406/): Code injection in n/a (high 8.8)
- [CVE-2026-25511](https://insights.sbomify.com/CVE-2026-25511/): Group-Office is vulnerable to SSRF and File Read in WOPI service discovery (high 8.2)
- [CVE-2023-46730](https://insights.sbomify.com/CVE-2023-46730/): Server-Side Request Forgery in groupoffice (high 7.4)
- [CVE-2025-25191](https://insights.sbomify.com/CVE-2025-25191/): Group-Office has a Stored XSS Vulnerability via user's name field (medium 6.9)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-25134 and fix it if it is affected.

What it is: CVE-2026-25134 is a critical command injection vulnerability in Intermesh groupoffice, published on 2 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-25134 in the wild and no public exploit code.

Affected product: Intermesh groupoffice. 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-2026-25134/ (Markdown: https://insights.sbomify.com/CVE-2026-25134/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-25134
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-25134
- OSV: https://osv.dev/vulnerability/CVE-2026-25134

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-25134/
Summaries are generated and may contain mistakes; the official description above is the record.