How severe is CVE-2021-21594?

CVE-2021-21594 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability high.

Is CVE-2021-21594 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21594?

CVE-2021-21594 primarily affects Dell Emc Powerscale Onefs. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-21594?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-21594 published?

CVE-2021-21594 was published on 2021-08-16 and last updated on 2026-06-17.

CVE-2021-21594

CVE-2021-21594 is a high-severity vulnerability in Dell Emc Powerscale Onefs with a CVSS 3.x base score of 8.2. 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-598.

Key facts

Severity: High (CVSS 3.x base score 8.2)
CVSS v2: 5.0
EPSS exploit prediction: 1% (52nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-598
Affected product: Dell Emc Powerscale Onefs
Published: 2021-08-16
Last modified: 2026-06-17

Description

Dell PowerScale OneFS versions 8.2.2 - 9.1.0.x contain a use of get request method with sensitive query strings vulnerability. It can lead to potential disclosure of sensitive data. Dell recommends upgrading at your earliest opportunity.

Frequently asked questions

What is CVE-2021-21594?: Dell PowerScale OneFS versions 8.2.2 - 9.1.0.x contain a use of get request method with sensitive query strings vulnerability. It can lead to potential disclosure of sensitive data. Dell recommends upgrading at your earliest opportunity.
How severe is CVE-2021-21594?: CVE-2021-21594 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability high.
Is CVE-2021-21594 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21594?: CVE-2021-21594 primarily affects Dell Emc Powerscale Onefs. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-21594?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-21594 published?: CVE-2021-21594 was published on 2021-08-16 and last updated on 2026-06-17.

References

https://www.dell.com/support/kbdoc/000190408

Affected products (2)

cpe:2.3:o:dell:emc_powerscale_onefs:*:*:*:*:*:*:*:*
cpe:2.3:o:dell:emc_powerscale_onefs:8.2.2:*:*:*:*:*:*:*

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