CVE-2026-7876Network attack vector

Unauthenticated file access via missing transfer restrictions

Published May 27, 2026 · Updated May 27, 2026

Authentication bypass in IBM Aspera HSTS for CP4I 1.5.1 through 1.5.19 allows remote attackers to access restricted server files. When specific restriction settings are absent, a transfer client reaches files in local server storage outside its authorized scope; IBM has not disclosed the affected authentication logic. No credentials or user interaction are required, and the reported consequence is unauthorized file access rather than service interruption.

CVSS severity9.1
Critical
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in IBM Aspera HSTS for CP4I 1.5.1 through 1.5.19 allows remote attackers to access restricted server files. When specific restriction settings are absent, a transfer client reaches files in local server storage outside its authorized scope; IBM has not disclosed the affected authentication logic. No credentials or user interaction are required, and the reported consequence is unauthorized file access rather than service interruption.

The record

CVE
CVE-2026-7876
Published
May 27, 2026
Updated
May 27, 2026
Vendor
OpenBMC Project
Product
IBM Aspera High-Speed Transfer Server for Cloud Pak for Integration
Classifications
CWE-287, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 27, 2026CVE publishedPublication date reported by the CVE source.
  2. May 27, 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=1.5.1 <=1.5.19

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OpenBMC Project · IBM Aspera High-Speed Transfer Server for Cloud Pak for Integrationversion=1.5.1 <=1.5.19

Published CVSS scores

9.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
9.1IBMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/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.

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-287Improper Authentication
T1190Exploit Public-Facing Application

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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