# CVE-2021-37726: Memory corruption in HPE Aruba Instant (IAP)

> Remote attackers can exploit a buffer overflow in HPE Aruba Instant Access Points to execute arbitrary code or cause denial of service.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 12 Oct 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-gmgh-mrc4-vrr5

## What is CVE-2021-37726?

CVE-2021-37726 is a critical memory corruption vulnerability in Siemens Scalance W1750d Firmware, published on 12 Oct 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A remote buffer overflow vulnerability was discovered in HPE Aruba Instant (IAP) version(s): Aruba Instant 8.7.x.x: 8.7.0.0 through 8.7.1.2. Aruba has released patches for Aruba Instant (IAP) that address this security vulnerability.

Weakness: CWE-120 (Buffer Copy without Checking Size of Input)

## Which versions are affected by CVE-2021-37726?

It affects 2 products.


Products: Arubanetworks Aruba Instant, Siemens Scalance W1750d Firmware.

## How do I fix CVE-2021-37726?

No fix has been published for CVE-2021-37726 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-37726 being exploited?

There is no known exploitation of CVE-2021-37726 in the wild and no public exploit code.

## Other vulnerabilities in Siemens Scalance W1750d Firmware

- [CVE-2018-7084](https://insights.sbomify.com/CVE-2018-7084/): Command injection in Aruba Instant (IAP) (critical 9.8)
- [CVE-2018-7083](https://insights.sbomify.com/CVE-2018-7083/): Information disclosure in Aruba Instant (IAP) (high 7.5)
- [CVE-2021-37727](https://insights.sbomify.com/CVE-2021-37727/): Command injection in HPE Aruba Instant (IAP) (high 7.2)
- [CVE-2021-37730](https://insights.sbomify.com/CVE-2021-37730/): Command injection in HPE Aruba Instant (IAP) (high 7.2)
- [CVE-2021-37732](https://insights.sbomify.com/CVE-2021-37732/): Command injection in HPE Aruba Instant (IAP) (high 7.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-37726 and fix it if it is affected.

What it is: CVE-2021-37726 is a critical memory corruption vulnerability in Siemens Scalance W1750d Firmware, published on 12 Oct 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-37726 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-2021-37726/ (Markdown: https://insights.sbomify.com/CVE-2021-37726/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-37726
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-37726
- OSV: https://osv.dev/vulnerability/CVE-2021-37726

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-37726/
Summaries are generated and may contain mistakes; the official description above is the record.