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CVE-2021-21553

26
FAUCET Score

CVE-2021-21553 is a critical Incorrect User Management vulnerability affecting Dell PowerScale OneFS versions 8.1.0 through 9.1.0, allowing the CompAdmin user to elevate privileges and bypass Compliance mode under specific conditions. With a CVSS score of 8.8 (High), this local vulnerability has low attack complexity and can lead to high impacts on confidentiality, integrity, and availability. There is currently no public exploit code available, no evidence of active exploitation, and minimal community discussion or media coverage. Dell recommends immediate upgrade to mitigate this risk.

Impacted Technologies

VendorProductVersion(s)CPE
>= 8.1.0, <= 9.1.0CPE matchmatch criteria
cpe:2.3:o:dell:powerscale_onefs:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.3HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.3
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.22%
Probability of exploitation in next 30 days
EPSS Percentile
12.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0022 is in the 43rd percentile among its peer group of 17,061 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

dell.com / support/kbdoc/000188148
Vendor Advisory