EUVD-2026-71607
GHSA-7wjh-qq66-9589
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Unauthenticated remote auth bypass (CWE-287) yields full system access, so PR:N/UI:N with C:H/I:H/A:H; AC:L accepted from vendor absent evidence of preconditions.
Primary rating from Vendor (ibm).
CVSS VectorNVD
Lifecycle Timeline
6DescriptionNVD
IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to gain unauthorized access due to improper validation of client-supplied authentication parameters.
AnalysisAI
Authentication bypass in IBM i (the operating system for IBM Power servers, formerly OS/400) versions 7.3, 7.4, 7.5, and 7.6 allows a remote attacker to gain unauthorized access by supplying malformed or manipulated authentication parameters that the system fails to validate correctly. Rated CVSS 9.8, the flaw grants full compromise of confidentiality, integrity, and availability without prior credentials. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires network access to the affected IBM i authentication service and the ability to submit manipulated client-supplied authentication parameters; per the CVSS vector (AV:N/AC:L/PR:N/UI:N) no prior credentials or user interaction are needed. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The signals are mixed but lean toward a genuine high priority tempered by no confirmed exploitation. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the IBM-provided fix per the vendor advisory at https://www.ibm.com/support/pages/node/7286186 (Patch available per vendor advisory - the input does not state an exact PTF or cumulative package identifier, so obtain the specific PTF number for your release from that node). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all IBM i systems running versions 7.3, 7.4, 7.5, or 7.6 and assess network accessibility; coordinate with IBM support to obtain the available security patch. …
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Same weakness CWE-287 – Improper Authentication
View allSame technique Authentication Bypass
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External POC / Exploit Code
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