EUVD-2026-63753
GHSA-653q-r79c-jfhv
Severity by source
AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Local unprivileged access suffices (AV:L, PR:L); scope changes to root (S:C) with no complexity barriers, driving full C/I/A impact.
Primary rating from Vendor (us).
CVSS VectorVendor: us
Lifecycle Timeline
2DescriptionCVE.org
IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 has a vulnerability in cmdnim that may allow an unprivileged local user to executes the payload as root.
AnalysisAI
Local privilege escalation in IBM AIX 7.2, 7.3 and PowerVM VIOS 4.1 allows an unprivileged local user to execute arbitrary payloads as root via the cmdnim utility. The CVSS vector (AV:L/AC:L/PR:L/S:C/C:H/I:H/A:H) confirms that any standard authenticated user account is sufficient to achieve full root-level code execution with no user interaction and no special configuration required. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an active, authenticated local session on the affected system with at minimum a standard unprivileged user account - confirmed by CVSS PR:L and AV:L. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 8.8 High score is driven by S:C (scope change to root) combined with full C:H/I:H/A:H impact, despite the local-only attack vector (AV:L). … 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 for the cmdnim privilege escalation as documented in the IBM support advisory at https://www.ibm.com/support/pages/node/7283858. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify and document all systems running IBM AIX 7.2, 7.3, or PowerVM VIOS 4.1, and restrict cmdnim execution permissions to root-only where possible. …
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Same weakness CWE-269 – Improper Privilege Management
View allSame technique Privilege Escalation
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External POC / Exploit Code
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