CVE-2026-28761Network attack vector

Unauthorized operations via forged authenticated requests

Published May 15, 2026 · Updated May 15, 2026

CSRF in Musetheque V4 Information Disclosure for IPKNOWLEDGE V4L1 rev2203.0 and earlier allows remote attackers to perform operations. Fujitsu Japan Limited has not disclosed the affected request handler or the precise request-validation failure. Exploitation requires a logged-in user to view a malicious page; public sources describe only unspecified operations, not their exact scope.

CVSS severity8.5
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CSRF in Musetheque V4 Information Disclosure for IPKNOWLEDGE V4L1 rev2203.0 and earlier allows remote attackers to perform operations. Fujitsu Japan Limited has not disclosed the affected request handler or the precise request-validation failure. Exploitation requires a logged-in user to view a malicious page; public sources describe only unspecified operations, not their exact scope.

The record

CVE
CVE-2026-28761
Published
May 15, 2026
Updated
May 15, 2026
Vendor
Fujitsu Japan Limited
Product
Musetheque V4 Information Disclosure for IPKNOWLEDGE
Classifications
CWE-352
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 15, 2026CVE publishedPublication date reported by the CVE source.
  2. May 15, 2026Record 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=V4L1 rev2203.0 and earlier

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Fujitsu Japan Limited · Musetheque V4 Information Disclosure for IPKNOWLEDGEversion=V4L1 rev2203.0 and earlier

Published CVSS scores

8.5JPCERT/CCCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
8.1JPCERT/CCCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/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.

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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-352Cross-Site Request Forgery (CSRF)

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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