Security readout for executives and security teams
Plain-English summary
Dell Unisphere for PowerMax before 9.2.1.6 has an authorization bypass. A signed-in user with a low-privilege monitor role could perform actions they should not be allowed to perform. The main business risk is unauthorized change or disruption to storage management operations, not data theft based on the supplied CVSS.
Executive priority
Prioritize remediation for environments where Unisphere manages critical PowerMax storage or has broad internal access. This is not documented as actively exploited in the supplied sources, but the potential for unauthorized actions against storage management makes delayed patching risky.
Technical view
CVE-2021-21531 affects Dell Unisphere for PowerMax versions prior to 9.2.1.6. The CVSS 3.1 vector is 8.1 high, with low attack complexity, low privileges required, no user interaction, high integrity impact, high availability impact, and no confidentiality impact. The record maps the issue to CWE-602.
Likely exposure
Exposure is most likely where Dell Unisphere for PowerMax is running below 9.2.1.6 and monitor-role accounts exist. The source bundle does not provide deployment defaults, internet exposure guidance, or a complete version matrix beyond the fixed-version threshold.
Exploitation context
The provided data does not show CISA KEV listing, active exploitation, or public exploit evidence. The stated attacker model is an authenticated user with monitor role. Treat this as an insider, compromised-account, or over-privileged-user risk affecting management-plane integrity and availability.
Researcher notes
Key constraints are PR:L and monitor role, with integrity and availability impacts rated high. The record reports AV:N while the description says local authenticated malicious user; validate deployment context carefully. Do not assume confidentiality impact or unauthenticated exploitation from the supplied evidence.
Mitigation direction
- Upgrade Dell Unisphere for PowerMax to 9.2.1.6 or later following Dell guidance.
- Review Dell advisory KB 000184565 for current vendor instructions.
- Remove unnecessary monitor-role accounts and stale authenticated access.
- Limit management interface access to trusted administrative networks.
- Monitor storage management logs for unauthorized configuration or operational changes.
Validation and detection
- Inventory Dell Unisphere for PowerMax deployments and record installed versions.
- Confirm no production instance is below version 9.2.1.6.
- Review role assignments for monitor users and remove unnecessary accounts.
- Check logs for monitor-role actions outside expected read-only behavior.
- Verify vendor advisory status before closing remediation tickets.
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-602: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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 lookupPrivilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-21531 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
- 8.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/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:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H2.85.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.1HighVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.dell.com/support/kbdoc/000184565CVE 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.
Client-Side Enforcement of Server-Side Security
Client-Side Enforcement of Server-Side Security represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.