CVE-2021-21550

Name: CVE-2021-21550
Creator: NVD / NIST
Published: 2021-05-06T13:15:11.267+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.7/10EPSS 0.27%

Last modified Jun 17, 2026

CVE-2021-21550 is a medium-severity vulnerability rated 6.7/10 on the CVSS scale. Dell EMC PowerScale OneFS 8.1.0-9.1.0 contain an improper neutralization of special elements used in an OS command vulnerability. This vulnerability can allow an authenticated user with ISI_PRIV_LOGIN_SSH or ISI_PRIV_LOGIN_CONSOLE privileges to escalate privileges.. EPSS estimates a 0.27% chance of exploitation in the next 30 days.

Description

Dell EMC PowerScale OneFS 8.1.0-9.1.0 contain an improper neutralization of special elements used in an OS command vulnerability. This vulnerability can allow an authenticated user with ISI_PRIV_LOGIN_SSH or ISI_PRIV_LOGIN_CONSOLE privileges to escalate privileges.

Metrics

CVSS 3.1

6.7/10

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

EPSS Probability

0.27%

18.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Dell	Emc Powerscale Onefs	8.1.1
Dell	Emc Powerscale Onefs	8.1.2
Dell	Emc Powerscale Onefs	8.2.1
Dell	Emc Powerscale Onefs	8.2.2
Dell	Emc Powerscale Onefs	9.0.0.0
Dell	Emc Powerscale Onefs	9.1.0.0

References

https://www.dell.com/support/kbdoc/000185978Vendor Advisory
https://www.dell.com/support/kbdoc/000185978Vendor Advisory

Timeline

Published: May 6, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-21550?

How severe is CVE-2021-21550?

CVE-2021-21550 has a CVSS score of 6.7/10 (MEDIUM severity). The EPSS model estimates a 0.27% probability of exploitation in the next 30 days.

How do I fix CVE-2021-21550?

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-2021-21550?

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

Scan your code now

Source: NVD / NIST