Security readout for executives and security teams
Plain-English summary
Dell PowerScale OneFS 9.1.0.x has a privilege management flaw. A legitimate user who can log in through SSH or console may be able to gain higher privileges on the appliance. This is most urgent where PowerScale stores sensitive data and many users have administrative or shell access.
Executive priority
Prioritize remediation for affected PowerScale environments that store sensitive business data or allow broad SSH/console access. This is a high-severity authenticated privilege escalation, not proven active exploitation from the provided sources.
Technical view
CVE-2021-21567 is CWE-732 improper privilege management in Dell PowerScale OneFS 9.1.0.x. CVSS 3.1 is 7.8: local attack vector, low complexity, low privileges, no user interaction, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure appears limited to Dell PowerScale OneFS 9.1.0.x systems where authenticated users have ISI_PRIV_LOGIN_SSH and/or ISI_PRIV_LOGIN_CONSOLE. The provided sources do not indicate unauthenticated remote exposure.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. Abuse would require an authenticated user with SSH and/or console login privilege, making insider, compromised account, or weak access governance scenarios the main concern.
Researcher notes
Evidence is concise and vendor-linked, but the prompt bundle does not include fixed versions, exploit details, or detailed mitigations. Treat Dell advisory KB 000189495 as the authoritative remediation source and avoid assuming other OneFS versions are affected.
Mitigation direction
- Review Dell KB 000189495 for official remediation guidance.
- Upgrade or patch affected OneFS 9.1.0.x systems per Dell guidance.
- Restrict ISI_PRIV_LOGIN_SSH and ISI_PRIV_LOGIN_CONSOLE to required administrators only.
- Harden and monitor SSH and console access to PowerScale management paths.
- Review privileged access changes and suspicious local login activity.
Validation and detection
- Inventory Dell PowerScale clusters and identify OneFS 9.1.0.x deployments.
- List users and roles with SSH or console login privileges.
- Confirm remediation status against Dell advisory KB 000189495.
- Review audit logs for unexpected privilege elevation or administrative changes.
- Verify compensating controls around management network access.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-732: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-21567 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H1.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.dell.com/support/kbdoc/000189495CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Incorrect Permission Assignment for Critical Resource
Incorrect Permission Assignment for Critical Resource represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.