Security readout for executives and security teams
Plain-English summary
Hitachi Content Platform had a tenant-isolation flaw. A tenant administrator could change another tenant’s configuration, and a non-administrator tenant user could view another tenant’s configuration. In a multitenant storage environment, this can create unauthorized data access and operational risk.
Executive priority
Prioritize remediation for any multitenant HCP environment because tenant boundaries protect sensitive business and customer data. The issue is not confirmed exploited in the bundle, but the potential cross-tenant confidentiality and integrity impact makes delayed remediation risky.
Technical view
CVE-2021-28052 is an improper authorization issue affecting Hitachi Content Platform versions before 8.3.7 and 9.0.0 versions before 9.2.3. The CVSS 3.1 score is 7.5, with network attack vector, low privileges required, high complexity, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is most likely in organizations running multitenant Hitachi Content Platform deployments on affected versions. The source bundle does not state internet exposure requirements, but CVSS marks the attack vector as network-based and requiring a low-privileged tenant account.
Exploitation context
The provided sources do not show active exploitation or public exploit availability. The CVE is not listed as KEV in the bundle. Treat it as high priority where HCP hosts sensitive data or separates customer, department, or partner tenants.
Researcher notes
Evidence is limited to CVE and Hitachi advisory references in the bundle. Key validation points are version state, multitenancy use, tenant role exposure, and logs showing configuration access across tenant boundaries. Do not assume affected CPEs beyond the named Hitachi Content Platform versions.
Mitigation direction
- Inventory HCP clusters and record exact installed versions.
- Upgrade affected HCP deployments to a fixed version per Hitachi guidance.
- Prioritize upgrades for multitenant systems holding regulated or customer data.
- Review tenant administrator accounts and remove unnecessary access.
- Monitor vendor advisories for supported upgrade paths and operational notes.
Validation and detection
- Confirm no HCP deployment runs before 8.3.7 or affected 9.0.0 builds before 9.2.3.
- Verify tenant administrator and tenant user accounts remain least-privileged.
- Review audit logs for cross-tenant configuration access anomalies.
- Check whether business-critical data is segmented by HCP tenants.
- Document remediation evidence for each HCP cluster.
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
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ATT&CK lookup starting points
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CWE-264: Exact CWE lookup
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Open ATT&CK lookupCVE-2021-28052 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
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/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:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H1.65.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.hitachi.com/hirt/hitachi-sec/2021/604.htmlCVE reference · x_refsource_MISC
- https://knowledge.hitachivantara.com/Security/HCP_Multitenancy_VulnerabilityCVE 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.
Permissions, Privileges, and Access Controls
Permissions, Privileges, and Access Controls represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.