What is CVE-2021-21526?

CVE-2021-21526 is a medium-severity vulnerability in Dell Powerscale Onefs, classified under OS Command Injection. CVSS score: 6.0/10. Published 2021-04-20.

How severe is CVE-2021-21526?

Medium severity. CVSS v3 base score is 6.0 out of 10.

RCE in Dell Powerscale Onefs

CVE-2021-21526

Dell PowerScale OneFS 8.1.0 - 9.1.0 contains a privilege escalation in SmartLock compliance mode that may allow compadmin to execute arbitrary commands as root.

Vulnerability class: Command Injection (OS Command Injection)

Published 2021-04-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.0 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H.

EPSS exploit prediction

EPSS: 0.003 (19.3th percentile), scored 2026-10-07.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 19.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Dell Powerscale Onefs — versions unspecified
Dell Powerscale Onefs

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

www.dell.com/support/kbdoc/000185202 (Vendor Advisory)

Frequently asked questions

What is CVE-2021-21526?: CVE-2021-21526 is a medium-severity vulnerability in Dell Powerscale Onefs, classified under OS Command Injection. CVSS score: 6.0/10. Published 2021-04-20.
How severe is CVE-2021-21526?: Medium severity. CVSS v3 base score is 6.0 out of 10.