# CVE-2025-34071: GFI Kerio Control Unsigned System Image Upload Root Code Execution

> Administrators can upload unsigned firmware images to execute arbitrary code with root privileges on Kerio Control devices.

- **Severity:** Critical 9.4 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 2 Jul 2025
- **Updated:** 26 Feb 2026
- **Also known as:** GHSA-p7cq-wxfh-7j76

## What is CVE-2025-34071?

CVE-2025-34071 is a critical vulnerability in GFI Software Kerio Control, published on 2 Jul 2025. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

A remote code execution vulnerability in GFI Kerio Control 9.4.5 allows attackers with administrative access to upload and execute arbitrary code through the firmware upgrade feature. The system upgrade mechanism accepts unsigned .img files, which can be modified to include malicious scripts within the upgrade.sh or disk image components. These modified upgrade images are not validated for authenticity or integrity, and are executed by the system post-upload, enabling root access.

Weakness: CWE-306 (Missing Authentication for Critical Functionality)

## Which versions are affected by CVE-2025-34071?

It affects 1 product.


Products: Gfi Kerio Control.

## How do I fix CVE-2025-34071?

No fix has been published for CVE-2025-34071 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-34071 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-34071 exists.

Public exploit code:

- RCE in Kerio Control 9.4.5 via unsigned firmware update. (github_poc): https://github.com/cppghoul/CVE-2025-34071

## Other vulnerabilities in GFI Software Kerio Control

- [CVE-2025-34070](https://insights.sbomify.com/CVE-2025-34070/): GFI Kerio Control GFIAgent Missing Authentication on Administrative Interfaces (critical 10.0)
- [CVE-2025-34069](https://insights.sbomify.com/CVE-2025-34069/): GFI Kerio Control GFIAgent Authentication Bypass via Proxy Forwarding (critical 9.5)
- [CVE-2024-52875](https://insights.sbomify.com/CVE-2024-52875/): Open redirect in Kerio Control (high 8.8)
- [CVE-2019-16414](https://insights.sbomify.com/CVE-2019-16414/): Cross-site scripting in n/a (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-34071 and fix it if it is affected.

What it is: CVE-2025-34071 is a critical vulnerability in GFI Software Kerio Control, published on 2 Jul 2025. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-34071 exists.

Affected product: GFI Software Kerio Control. 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-2025-34071/ (Markdown: https://insights.sbomify.com/CVE-2025-34071/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-34071
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-34071
- OSV: https://osv.dev/vulnerability/CVE-2025-34071

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-34071/
Summaries are generated and may contain mistakes; the official description above is the record.