# CVE-2026-21421: Privilege escalation in PowerScale OneFS

> A local high-privileged attacker can exploit unnecessary privileges in Dell PowerScale OneFS to elevate their access rights.

- **Severity:** Medium 6.7 (`CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 4 Mar 2026
- **Updated:** 5 Mar 2026
- **Also known as:** GHSA-wpm4-hf9v-5h6m

## What is CVE-2026-21421?

CVE-2026-21421 is a medium-severity vulnerability in Dell Powerscale Onefs, published on 4 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Dell PowerScale OneFS, versions prior to 9.10.1.6 and versions 9.11.0.0 through 9.12.0.1, contains an execution with unnecessary privileges vulnerability. A high privileged attacker with local access could potentially exploit this vulnerability, leading to elevation of privileges.

Weakness: CWE-250 (Execution with Unnecessary Privileges)

## Which versions are affected by CVE-2026-21421?

It affects 1 product.


Products: Dell Powerscale Onefs.

## How do I fix CVE-2026-21421?

No fix has been published for CVE-2026-21421 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-21421 being exploited?

There is no known exploitation of CVE-2026-21421 in the wild and no public exploit code.

## Other vulnerabilities in Dell Powerscale Onefs

- [CVE-2024-53298](https://insights.sbomify.com/CVE-2024-53298/): Missing authorization in PowerScale OneFS (critical 9.8)
- [CVE-2025-27690](https://insights.sbomify.com/CVE-2025-27690/): Hardcoded credentials in PowerScale OneFS (critical 9.8)
- [CVE-2022-31229](https://insights.sbomify.com/CVE-2022-31229/): Information disclosure in PowerScale OneFS (critical 9.6)
- [CVE-2026-22278](https://insights.sbomify.com/CVE-2026-22278/): Auth bypass in PowerScale OneFS (high 8.1)
- [CVE-2024-29170](https://insights.sbomify.com/CVE-2024-29170/): Hardcoded credentials in PowerScale OneFS (high 8.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-21421 and fix it if it is affected.

What it is: CVE-2026-21421 is a medium-severity vulnerability in Dell Powerscale Onefs, published on 4 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-21421 in the wild and no public exploit code.

Affected product: Dell Powerscale Onefs. 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-2026-21421/ (Markdown: https://insights.sbomify.com/CVE-2026-21421/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-21421
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-21421
- OSV: https://osv.dev/vulnerability/CVE-2026-21421

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-21421/
Summaries are generated and may contain mistakes; the official description above is the record.