How severe is CVE-2021-21549?

CVE-2021-21549 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-21549 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21549?

CVE-2021-21549 affects Dell Xtremio Management Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-21549?

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-2021-21549 published?

CVE-2021-21549 was published on 2021-05-21 and last updated on 2026-06-17.

CVE-2021-21549

CVE-2021-21549 is a high-severity vulnerability in Dell Xtremio Management Server with a CVSS 3.x base score of 8.8. 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-352.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.8
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-352
Affected product: Dell Xtremio Management Server
Published: 2021-05-21
Last modified: 2026-06-17

Description

Dell EMC XtremIO Versions prior to 6.3.3-8, contain a Cross-Site Request Forgery Vulnerability in XMS. A non-privileged attacker could potentially exploit this vulnerability, leading to a privileged victim application user being tricked into sending state-changing requests to the vulnerable application, causing unintended server operations.

Frequently asked questions

What is CVE-2021-21549?: Dell EMC XtremIO Versions prior to 6.3.3-8, contain a Cross-Site Request Forgery Vulnerability in XMS. A non-privileged attacker could potentially exploit this vulnerability, leading to a privileged victim application user being tricked into sending state-changing requests to the vulnerable application, causing unintended server operations.
How severe is CVE-2021-21549?: CVE-2021-21549 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-21549 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21549?: CVE-2021-21549 affects Dell Xtremio Management Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-21549?: 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-2021-21549 published?: CVE-2021-21549 was published on 2021-05-21 and last updated on 2026-06-17.

References

https://www.dell.com/support/kbdoc/000186363

Affected products (1)

cpe:2.3:a:dell:xtremio_management_server:*:*:*:*:*:*:*:*

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