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CVE-2021-28052

20
FAUCET Score

CVE-2021-28052 is a privilege escalation vulnerability affecting Hitachi Content Platform (HCP) versions prior to 8.3.7 and 9.0.0 versions prior to 9.2.3. It allows a tenant administrator to modify configurations in another tenant or a tenant user to view configurations in another tenant without authorization. The vulnerability has a CVSS score of 4.9 (MEDIUM), indicating a network-based attack with low complexity, requiring high privileges, and potentially leading to unauthorized data access. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 8.3.7CPE matchmatch criteria
cpe:2.3:a:hitach:vantara:*:*:*:*:*:*:*:*
>= 9.0.0, < 9.2.3CPE matchmatch criteria
cpe:2.3:a:hitach:vantara:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.6
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.68%
Probability of exploitation in next 30 days
EPSS Percentile
48.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0068 is in the 49th percentile among its peer group of 3,562 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

knowledge.hitachivantara.com / Security/HCP_Multitenancy_Vulnerability
Vendor Advisory
hitachi.com / hirt/hitachi-sec/2021/604.html
Vendor Advisory