# CVE-2021-25156: Path traversal in Aruba Instant Access Points

> Remote attackers can create arbitrary directories on Aruba Instant Access Points, potentially leading to unauthorized data modification.

- **Severity:** Medium 4.9 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 30 Mar 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-6896-p39g-5747

## What is CVE-2021-25156?

CVE-2021-25156 is a medium-severity path traversal vulnerability in Siemens Scalance W1750d Firmware, published on 30 Mar 2021. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

A remote arbitrary directory create vulnerability was discovered in some Aruba Instant Access Point (IAP) products in version(s): Aruba Instant 6.4.x: 6.4.4.8-4.2.4.17 and below; Aruba Instant 6.5.x: 6.5.4.18 and below; Aruba Instant 8.3.x: 8.3.0.14 and below; Aruba Instant 8.5.x: 8.5.0.11 and below; Aruba Instant 8.6.x: 8.6.0.6 and below; Aruba Instant 8.7.x: 8.7.1.0 and below. Aruba has released patches for Aruba Instant that address this security vulnerability.

## Which versions are affected by CVE-2021-25156?

It affects 2 products.


Products: Arubanetworks Instant, Siemens Scalance W1750d Firmware.

## How do I fix CVE-2021-25156?

No fix has been published for CVE-2021-25156 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-25156 being exploited?

There is no known exploitation of CVE-2021-25156 in the wild and no public exploit code.

Public exploit code:

- Aruba Instant (IAP) - Remote Code Execution (exploitdb)

## Other vulnerabilities in Siemens Scalance W1750d Firmware

- [CVE-2019-5319](https://insights.sbomify.com/CVE-2019-5319/): Memory corruption in Aruba Instant Access Points (critical 9.8)
- [CVE-2020-24636](https://insights.sbomify.com/CVE-2020-24636/): Command injection in Aruba Instant Access Points (critical 9.8)
- [CVE-2021-25149](https://insights.sbomify.com/CVE-2021-25149/): Memory corruption in Aruba Instant Access Points (critical 9.8)
- [CVE-2021-25150](https://insights.sbomify.com/CVE-2021-25150/): Command injection in Aruba Instant Access Points (high 8.8)
- [CVE-2021-25144](https://insights.sbomify.com/CVE-2021-25144/): Memory corruption in Aruba Instant Access Points (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-25156 and fix it if it is affected.

What it is: CVE-2021-25156 is a medium-severity path traversal vulnerability in Siemens Scalance W1750d Firmware, published on 30 Mar 2021. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-25156 in the wild and no public exploit code.

Affected product: Siemens Scalance W1750d Firmware. 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-2021-25156/ (Markdown: https://insights.sbomify.com/CVE-2021-25156/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-25156
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-25156
- OSV: https://osv.dev/vulnerability/CVE-2021-25156

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-25156/
Summaries are generated and may contain mistakes; the official description above is the record.