# CVE-2025-27026: Improper Access Control Granularity impacting Infinera G42

> An authenticated administrator can inadvertently disable all management interfaces, including the WebGUI and CLI, leading to a complete loss of device control.

- **Severity:** Medium 4.9 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A: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:** 2 Jul 2025
- **Also known as:** GHSA-q3gw-3m7f-273f

## What is CVE-2025-27026?

CVE-2025-27026 is a medium-severity missing authorization vulnerability in Infinera G42, published on 2 Jul 2025. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

A missing double-check feature in the WebGUI for CLI deactivation in Infinera G42 
version R6.1.3 allows an authenticated administrator to make other 
management interfaces unavailable via local and network interfaces. The CLI deactivation via the WebGUI does not only stop CLI interface but deactivates also Linux Shell, WebGUI and Physical Serial Console access. No 
confirmation is asked at deactivation time. Loosing access to these services device administrators are at risk of completely loosing device control.

Weakness: CWE-1220 (Insufficient Granularity of Access Control)

## Which versions are affected by CVE-2025-27026?

It affects 1 product.


Products: Nokia G42 Firmware.

## How do I fix CVE-2025-27026?

No fix has been published for CVE-2025-27026 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-27026 being exploited?

There is no known exploitation of CVE-2025-27026 in the wild and no public exploit code.

## Other vulnerabilities in Infinera G42

- [CVE-2025-27022](https://insights.sbomify.com/CVE-2025-27022/): Path Traversal Vulnerability in Infinera G42 (high 7.5)
- [CVE-2025-27021](https://insights.sbomify.com/CVE-2025-27021/): Operating System Misconfiguration in Infinera G42 (high 7.0)
- [CVE-2025-27023](https://insights.sbomify.com/CVE-2025-27023/): Improper Input Validation in Infinera G42 (medium 6.5)
- [CVE-2025-27024](https://insights.sbomify.com/CVE-2025-27024/): Improper File Access in Infinera G42 (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-27026 and fix it if it is affected.

What it is: CVE-2025-27026 is a medium-severity missing authorization vulnerability in Infinera G42, published on 2 Jul 2025. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-27026 in the wild and no public exploit code.

Affected product: Infinera G42. 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-2025-27026/ (Markdown: https://insights.sbomify.com/CVE-2025-27026/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-27026
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-27026
- OSV: https://osv.dev/vulnerability/CVE-2025-27026

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-27026/
Summaries are generated and may contain mistakes; the official description above is the record.