CVE-2021-28052Network attack vector

Cross-tenant access via missing namespace authorization

Published Sep 26, 2022 · Updated May 21, 2025

Authorization bypass in Hitachi Content Platform before 8.3.7 and 9.0.0 through 9.2.2 allows remote authenticated users cross-tenant access. The multitenancy security model fails to enforce tenant authorization when a request identifies another namespace by UUID; Hitachi has not identified the affected request handler. Tenant users can read another tenant's namespace configuration, while tenant administrators can also change that configuration and thereby access its data.

CVSS severity7.5
High
EPSS probability0.70%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in Hitachi Content Platform before 8.3.7 and 9.0.0 through 9.2.2 allows remote authenticated users cross-tenant access. The multitenancy security model fails to enforce tenant authorization when a request identifies another namespace by UUID; Hitachi has not identified the affected request handler. Tenant users can read another tenant's namespace configuration, while tenant administrators can also change that configuration and thereby access its data.

The record

CVE
CVE-2021-28052
Published
Sep 26, 2022
Updated
May 21, 2025
Vendor
Hitachi Vantara
Product
Hitachi Content Platform
Classifications
CWE-862, CWE-264, T1078
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 26, 2022CVE publishedPublication date reported by the CVE source.
  2. May 21, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=9.0.0 <9.2.3
  2. Affected versionversion=unspecified <8.3.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Hitachi Vantara · Hitachi Content Platformversion=9.0.0 <9.2.3; version=unspecified <8.3.7

Published CVSS scores

7.1Hitachi, Ltd.AV:N/AC:H/Au:S/C:C/I:C/A:C
7.5Hitachi, Ltd.CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
4.9NISTCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
CWE-264Permissions, Privileges, and Access Controls
T1078Valid Accounts

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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