CVE-2023-43040Network attack vector

Unauthorized bucket actions via improper RGW access

Published May 13, 2024 · Updated Nov 4, 2025

Improper access control in Ceph RGW in IBM Spectrum Fusion HCI 2.5.2 through 2.7.2 allows remote attackers to perform unauthorized bucket actions. IBM identifies improper bucket access in the Ceph RADOS Gateway but has not published the request path, policy check, or permission decision that fails. The optional Data Foundation service must be configured, and the reported impact is limited to unauthorized RGW actions rather than data disclosure.

CVSS severity6.5
Medium
EPSS probability2.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Ceph RGW in IBM Spectrum Fusion HCI 2.5.2 through 2.7.2 allows remote attackers to perform unauthorized bucket actions. IBM identifies improper bucket access in the Ceph RADOS Gateway but has not published the request path, policy check, or permission decision that fails. The optional Data Foundation service must be configured, and the reported impact is limited to unauthorized RGW actions rather than data disclosure.

The record

CVE
CVE-2023-43040
Published
May 13, 2024
Updated
Nov 4, 2025
Vendor
IBM
Product
IBM Spectrum Fusion HCI Software
Classifications
CWE-1220, CAPEC-180, CAPEC-1
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 13, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 4, 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=2.5.2
  2. Affected versionversion=2.5.2 <=2.7.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IBM · IBM Spectrum Fusion HCI Softwareversion=2.5.2; version=2.5.2 <=2.7.2

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
6.5IBM CorporationCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1220Insufficient Granularity of Access Control
CAPEC-180Exploiting Incorrectly Configured Access Control Security Levels
CAPEC-1Accessing Functionality Not Properly Constrained by ACLs

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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