EUVD-2026-63634
GHSA-mqx3-7pm8-6mjp
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Improper authentication yields unauthenticated network RCE (AV:N/PR:N/UI:N) with total system impact (C/I/A:H); scope unchanged as code runs on the vulnerable host itself.
Primary rating from Vendor (ibm).
CVSS VectorNVD
Lifecycle Timeline
6DescriptionNVD
IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote attacker to execute arbitrary code due to improper authentication.
AnalysisAI
Remote code execution in IBM AIX 7.2 and 7.3 and IBM PowerVM VIOS 4.1 allows a network-based attacker to run arbitrary code by bypassing authentication (CWE-287). The CVSS 9.8 rating reflects unauthenticated network exploitation with total confidentiality, integrity, and availability impact, though there is no public exploit identified at time of analysis and it is not listed in CISA KEV. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Per the CVSS vector (AV:N/AC:L/PR:N/UI:N), no special conditions are required - remote unauthenticated exploitation is possible against affected IBM AIX 7.2/7.3 and PowerVM VIOS 4.1 systems whose vulnerable network service is reachable by the attacker. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The signals are largely aligned toward high priority: the CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N) describes trivial, unauthenticated, network-reachable exploitation, and SSVC rates Technical Impact as 'total,' consistent with full RCE. … 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 as the primary remediation - patch details and interim/APAR fixes are published in the IBM Security Bulletin at https://www.ibm.com/support/pages/node/7283858 (patch confirmed available per vendor advisory; no exact fix build number is stated in the provided data, so obtain the precise iFix/service pack from that bulletin). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, audit infrastructure to identify all systems running IBM AIX 7.2, 7.3, and IBM PowerVM VIOS 4.1 and document network-facing exposure. …
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OS command injection in IBM AIX 7.2/7.3 and PowerVM VIOS 4.1 lets a remote authenticated attacker run arbitrary commands
IBM AIX 7.2 and 7.3 nimesis NIM master service could allow a remote attacker to execute arbitrary commands due to improp
Same weakness CWE-287 – Improper Authentication
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External POC / Exploit Code
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