How severe is CVE-2021-21550?

CVE-2021-21550 has a CVSS 3.x base score of 6.0, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2021-21550 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21550?

CVE-2021-21550 primarily affects Dell Emc Powerscale Onefs. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-21550?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-21550 published?

CVE-2021-21550 was published on 2021-05-06 and last updated on 2026-06-17.

CVE-2021-21550

CVE-2021-21550 is a medium-severity vulnerability in Dell Emc Powerscale Onefs with a CVSS 3.x base score of 6.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-78.

Key facts

Severity: Medium (CVSS 3.x base score 6.0)
CVSS v2: 7.2
EPSS exploit prediction: 0% (19th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Dell Emc Powerscale Onefs
Published: 2021-05-06
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2021-21550?: 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.
How severe is CVE-2021-21550?: CVE-2021-21550 has a CVSS 3.x base score of 6.0, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2021-21550 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21550?: CVE-2021-21550 primarily affects Dell Emc Powerscale Onefs. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-21550?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-21550 published?: CVE-2021-21550 was published on 2021-05-06 and last updated on 2026-06-17.

References

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

Affected products (6)

cpe:2.3:o:dell:emc_powerscale_onefs:8.1.1:*:*:*:*:*:*:*
cpe:2.3:o:dell:emc_powerscale_onefs:8.1.2:*:*:*:*:*:*:*
cpe:2.3:o:dell:emc_powerscale_onefs:8.2.1:*:*:*:*:*:*:*
cpe:2.3:o:dell:emc_powerscale_onefs:8.2.2:*:*:*:*:*:*:*
cpe:2.3:o:dell:emc_powerscale_onefs:9.0.0.0:*:*:*:*:*:*:*
cpe:2.3:o:dell:emc_powerscale_onefs:9.1.0.0:*:*:*:*:*:*:*

More vulnerabilities in Dell Emc Powerscale Onefs

CVE-2021-21502 — Critical (CVSS 9.8): Dell PowerScale OneFS versions 8.1.0 – 9.1.0 contain a "use of SSH key past account expiration" vulnerability. A user…
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