EUVD-2026-63389
GHSA-26qm-x758-cmmx
Severity by source
AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Local low-privilege access suffices to set ODMDIR; scope change reflects privileged ODM-dependent system components executing injected commands, warranting full C/I/A.
Primary rating from Vendor (ibm).
CVSS VectorVendor: ibm
Lifecycle Timeline
2DescriptionCVE.org
IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a local attacker to execute arbitrary commands due to improper validation of the ODMDIR environment variable.
AnalysisAI
Arbitrary OS command execution via ODMDIR environment variable manipulation affects IBM AIX 7.2 and 7.3 and PowerVM VIOS 4.1, enabling local authenticated users to escalate privileges beyond their initial access boundary. The CVSS scope change (S:C) indicates that successful exploitation can compromise components outside the immediate process context - a critical concern for AIX systems hosting sensitive workloads. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a local user account with at least standard (low) privileges - confirmed by CVSS PR:L. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 8.8 score accurately reflects a serious local privilege escalation: AV:L confirms exploitation requires local access, PR:L means any standard user account suffices, AC:L indicates no special timing or race conditions are needed, and S:C with full C:H/I:H/A:H means the attacker can achieve complete system compromise including potential hypervisor-layer impact via PowerVM VIOS. … 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 | IBM has released a patch available through the IBM support portal at https://www.ibm.com/support/pages/node/7283858; administrators should apply the vendor-supplied fix immediately. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all IBM AIX 7.2, 7.3, and PowerVM VIOS 4.1 systems and obtain the available vendor patch from IBM's support portal. …
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Same weakness CWE-78 – OS Command Injection
View allSame technique Command Injection
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External POC / Exploit Code
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